I've been there and I read your post clenching my teeth. You have my sympathies but I'm sorry to say that within my very long (and otherwise pretty great) relationship I haven't cracked that code yet.
Here's the problem with being an FA: We like something our partners (usually) dislike about themselves, which is their fat. Barring major health or mobility issues, they dislike being fat mostly because the rest of the world — often including loved ones — tell them they're ugly, lazy, disgusting and so on. Often from early childhood. Body positivity only worked so well at its peak a few years ago, and it's collapsing now with GLP1s.
So we do this dance where we praise everything else about them but avoid the main thing that turns us on sexually. Then it becomes the elephant in the room (so to speak) where we have to fall back on "softness" or whatever. Which any woman past the love-drunk first few months of a relationship ain't gonna buy. I mean, she will, if she's into you otherwise, but she's not gonna swoon when you tell her how much her huge, dimply, wobbly ass turns you on.
A dude with yellow or jungle fever doesn't have to deal with this. Their partners may be victims of racism and hold internalized self-hatred over it but even a 40 year KKK member doesn't hold it against them as a personal failing. (And even in 2026 most of the world believes racism = bad... Can't say that for fatphobia.) Even a foot fetishist may be ashamed of himself for being weird and his partner may think he's weird too but most women have feet and so they're nothing to be ashamed of. She can play along or not but it won't be gouging a hole in her already rickety self esteem.
I generally hate "oh woe is me, FA" comments and so I'll qualify all this by saying I'm glad I have this preference/fetish/whatever because it led me to the woman in my life, and other great people and experiences before her. And unlike being gay I've never had any serious pushback in any aspect of my life except some side eye from friends and family (and if you can't handle that, turn in your man card and go join a monastery til you've figured it out).
Still it would be nice if I could be 100% with my partner as I try to be with most other aspects of my life, but I just don't see that happening.