Your saga sounds like an extension of the struggles queer authors have been increasingly experiencing in society at large. I'm thinking of the public library relatively near me that taxpayers shut down in part because librarians refused to remove the graphic novel Heartstopper.
Locals insisted Heartstopper is salacious and inappropriate for young readers, even though it contains no sex, merely queer characters who fall in love.
I'm thinking of Jonathan Evison's Lawn Boy, at the top of ban lists this year, branded as overly sexual, when the only thing "overly" about a romance subplot is that two gay men are involved.
Take a significant number of people who believe any kind of queer romance is inappropriate to the general public and mix in Facebook's opaque communication style, meaning (usually) no communication at all.
That's a sure-fire recipe for letting employees ban queer ads on personal whim.
Your ad running now is a Christmas miracle, indeed!