I will be adding on to this as I find more but this is what I have so far.
Some of these have trigger warnings such as homophobia and transphobia. I will put an asterisk next to each of those. Also, some of these contain mature scenes. A quick google search should be able to tell you whether the book has those or not.
Check, Please! by Ngozi Ukazu (two books) comics, contemporary
Malice by Heather Walter (Misrule is the sequel and it is good too) sleeping beauty retelling, fantasy, past
the Henna Wars* by Adiba Jaigirdar contemporary enemies-to-lovers
Hanni and Ishu's guide to fake dating* by Adiba Jaigirdar contemporary
Simon vs. the Homosapiens Agenda* by Becky Albertalli contemporary
Leah on the Offbeat by Becky Albertalli contemporary
What if it's us* (and Here's to us) by Becky Albertalli and Adam Silvera Contemporary
A few of the stories in Serendipity (an anthology) I don't remember if any of those have homophobia or not. I think they're are all contemporary
The last story in The End and Other Beginnings by Veronica Roth fantasy
Ash by Malinda Lo cinderella retelling, past, fantasy
The falling in love montage by Ciara Smyth contemporary
Red, white and royal blue* by Casey McQuiston Contemporary enemies-to-lovers
One last stop by Casey McQuiston Contemporary, fantasy
Georgia Peaches and Other Forbidden Fruit* by Jaye Robin Brown Contemporary
The Coldest Touch by Isabel Sterling Contemporary, fantasy
She Drives Me Crazy* by Kelly Quindlen, contemporary, enemies-to-lovers
The Fates Divide by Veronica Roth fantasy, enemies-to-lovers (read Carve the Mark first. The gay relationship only shows up at the end but you need to read it to understand the story)
Master of One by Dani Bennett and Jaida Jones fantasy, heist
The Key to You and Me* by Jaye Robin Brown contemporary
Openly Straight* by Bill Konigsberg contemporary
Before We Disappear by Shaun David Hutchinson past, fantasy, heist
Some Girls Do* by Jennifer Dugan contemporary, mental health issues/abuse warning
Melt With You by Jennifer Dugan contemporary
Howl by Shaun David Hutchinson contemporary, mystery, fantasy
I Kissed Shara Wheeler by Casey McQuiston contemporary, mystery
Boyfriend Material* by Joe Jameson fake dating, contemporary
Verona Comics* by Jennifer Dugan contemporary, major mental health issues, family issues, suicide mentions (technically, this doesn't fall into the lgbtq+ category but both main characters are bi or pan and it has some very important lessons that a lot of the other books in the genre also have)
Girl, Serpent, Thorn by Melissa Bashardoust fantasy, enemies-to-friends-to-lovers
Jay's Gay Agenda by Jason June Contemporary, realistic fiction
So This is Ever After by F.T. Lukens Fantasy, past
Hot Dog Girl by Jennifer Dugan contemporary, realistic fiction
Delilah Greene Doesn't Care by Ashley Herring Blake contemporary, enemies-to-friends-to lovers, realistic fiction
Trans and Non-binary Books
Meet Cute Diary* by Emery Lee Contemporary
Chef's Kiss* by T. J. Alexander Contemporary
May the Best Man Win* by ZR Ellor contemporary,
Cemetary boys* by Aiden Thomas contemporary, fantasy
Love & Other Disasters* by Anita Kelly contemporary
Act Cool* by Tobly McSmith contemporary, mental health issues, dysphoria
I wish you all the Best* by Mason Deaver contemporary, mental health issues
A Quick and Easy Guide to They/Them pronouns by Archie Bongiovanni and Tristan Jimerson non-fiction, very short, great for enbys, allies, and other parties, humorous, good resource for educating yourself & others on gender nuances, comic
Man o' War* by Cori McCarthy contemporary, mental health issues, dysphoria
Out of the Blue by Jason June contemporary, fantasy
Stay Gold* by Tobly McSmith contemporary, realistic fiction
Fine: A Comic About Gender by Rhea Ewing great for enbys, allies, and other parties, good resource for educating yourself & others on gender nuances, comic
High Class Homos Gay, royalty, past, fantasy
The Doctors Are Out Gay, Contemporary, Enemies-to-friends-to-lovers
Heartstopper* Gay, Contemporary, friends-to-lovers, mental health issues (there's a tv show based on this one and it's amazing!)