I'm seconding Crier's War and Iron Heart by Nina Varela, Priory of the Orange Tree by Samantha Shannon, SD Simper's Fallen Gods series, Compass Rose and Sea Wolf by Anna Burke (also Nottingham by her!).
and adding on:
An Accident of Stars and A Tyranny of Queens by Foz Meadows (part scifi/mostly fantasy of parallel worlds and magic and lots of queerness)
True Nature and Second Nature by Jae (shifter urban fantasy sapphic romances)
The Space Between Worlds by Micaiah Johnson (reallllly cool sci-fi, parallel universe, anti capitalism, take on poverty and climate change with a side of sapphic romance dashed in)
Five Moons Rising and Hunter's Descent by Lise MacTague (werewolf and other supernatural vibes with sapphic romance)
The Unspoken Name and The Thousand Eyes by A.K. Larkwood (total epic fantasy with gods and diffrent worlds and magic and mlm, wlw, nonbinary [in book 2] pov character rep)
Dead Lez Walking by G. Benson (horror zombie survival tale, with a side of sapphic romance)
The Jasmine Throne by Tasha Suri (full fantasy with really cool magic/worlbuilding and a side of sapphic romance)
Girl, Serpent, Thorn by Melissa Bashardoust (ya persian inspired mythology fantasy with sapphic romance)
Witching Moon by Poppy Woods (a down on her luck witch falls in love WITH THE LITERAL MOON, wlw)
Gideon the Ninth and Harrow the Ninth (and soon to be Nona the Ninth) by Tamsyn Muir (space necromancer lesbians!!!)
Payback's a Witch by Lana Harper (witches, small town sapphic romance)
Malice and Misrule by Heather Walter (ya sleeping beauty/maleficent sapphic retelling)
The Midnight Girls and The Dark Tide (not a series or a duology like the rest) by Alicia Jasinska (but both ya sapphic romance, both with witches, magic, and monsters)
Scatter by Molly J Bragg (time travel, superhero, aliens and also dragons and magic, lol, sapphic romance)
One Last Stop by Casey McQuiston (time travel sapphic found family queer vibes romance)
Wild by Meghan O'Brien (shifter romance/mystery, slightly verging on erotica at times, but not really, just a heads up)
Lucky 7 & Lucky 8 by Rae D Magdon (sci-fi heist found family queer romance)
Reaping the Benefits by EJ Noyes (sapphic romance with death, gods, etc. kinda urban fantasy vibes)
The Lost Girls by Sonia Hartl (ya queer girl john tucker must die, but VAMPIRES)
Ice Massacre, Ice Crypt and Ice Kingdom by Tiana Warner (ya trilogy humans and violent mermaids are at war, but enemies to lovers sapphic teens are romeo and julietteing their way through it)
Good Enough to Eat by Jae & Aurora Rey (vampire trying not to drink blood joins AA, falls in love with basically, a former genie, sapphic)
and adding on:
An Accident of Stars and A Tyranny of Queens by Foz Meadows (part scifi/mostly fantasy of parallel worlds and magic and lots of queerness)
True Nature and Second Nature by Jae (shifter urban fantasy sapphic romances)
The Space Between Worlds by Micaiah Johnson (reallllly cool sci-fi, parallel universe, anti capitalism, take on poverty and climate change with a side of sapphic romance dashed in)
Five Moons Rising and Hunter's Descent by Lise MacTague (werewolf and other supernatural vibes with sapphic romance)
The Unspoken Name and The Thousand Eyes by A.K. Larkwood (total epic fantasy with gods and diffrent worlds and magic and mlm, wlw, nonbinary [in book 2] pov character rep)
Dead Lez Walking by G. Benson (horror zombie survival tale, with a side of sapphic romance)
The Jasmine Throne by Tasha Suri (full fantasy with really cool magic/worlbuilding and a side of sapphic romance)
Girl, Serpent, Thorn by Melissa Bashardoust (ya persian inspired mythology fantasy with sapphic romance)
Witching Moon by Poppy Woods (a down on her luck witch falls in love WITH THE LITERAL MOON, wlw)
Gideon the Ninth and Harrow the Ninth (and soon to be Nona the Ninth) by Tamsyn Muir (space necromancer lesbians!!!)
Payback's a Witch by Lana Harper (witches, small town sapphic romance)
Malice and Misrule by Heather Walter (ya sleeping beauty/maleficent sapphic retelling)
The Midnight Girls and The Dark Tide (not a series or a duology like the rest) by Alicia Jasinska (but both ya sapphic romance, both with witches, magic, and monsters)
Scatter by Molly J Bragg (time travel, superhero, aliens and also dragons and magic, lol, sapphic romance)
One Last Stop by Casey McQuiston (time travel sapphic found family queer vibes romance)
Wild by Meghan O'Brien (shifter romance/mystery, slightly verging on erotica at times, but not really, just a heads up)
Lucky 7 & Lucky 8 by Rae D Magdon (sci-fi heist found family queer romance)
Reaping the Benefits by EJ Noyes (sapphic romance with death, gods, etc. kinda urban fantasy vibes)
The Lost Girls by Sonia Hartl (ya queer girl john tucker must die, but VAMPIRES)
Ice Massacre, Ice Crypt and Ice Kingdom by Tiana Warner (ya trilogy humans and violent mermaids are at war, but enemies to lovers sapphic teens are romeo and julietteing their way through it)
Good Enough to Eat by Jae & Aurora Rey (vampire trying not to drink blood joins AA, falls in love with basically, a former genie, sapphic)