Heyo, nice list! I think youd enjoy "The cursed melodies"!

Can I recommend? Please?

The Reluctant Husband by Eliot Grayson

Breeze Spells and Bridegrooms by Sarah Wallace and S.O Callahan (all the books in this series really)

(Most of) The Meddle & Mend series by Sarah Wallace

The Emperors Omega by Corey Kerr (all the books in this series)

Tryggred by the Orc by Finley Fenn

Shoestring Theory by Mariana Costa (its not really mentioned but gay marriage is definitely legal and none of the characters face any homophobia that I remember)

Infinity Alchemist by Kacen Callender

Costumes for Timetravelers by A. R. Capetta