https://www.mangago.zone/read-manga/fangs/
If you haven't read it already. It's the best bl vampire story, in my opinion.
i recommend 'dine with a vampire ', i think it's completed !
https://www.mangago.zone/read-manga/bottomless_swamp_bookcube_version/ this is probably ass cheeks though I dropped it 3 years ago and don't remember much
https://www.mangago.zone/read-manga/blood_strangers/
Now this is good shit but it's not bl but you can interpret it that way (the author has said their relationship is more than lovers but deeper than family) the ending is sad though.
Here you go dear, just look through my list Enjoy! https://www.mangago.zone/home/mangalist/1566980/
I need a bl with vampires, I've been obsessing recently