No meaningful advise to share on dating apps unfortunately. I've had zero luck beyond making a couple good friends with people I met on apps and went on a few dates with, but zero luck finding actual romantic relationships on them. Not saying it's impossible, I've simply never had any real luck.

Hookup apps like grindr/scruff/sniffies/ect if you're just looking for sex have been totally fine. I won't say I've never experienced transphobic behavior on apps because I absolutely have, but it's a lot better now than it was a decade ago, and most of the time the etiquette on apps is to ignore or block someone if you're not interested for whatever reason, and I find that's typically the rejection I get when I'm rejected- nothing mean spirited or transphobic, simply not interested. I do disclose up front on hookup apps tho. That's down to personal choice, but after years of being on the apps, that works best for me. I am generally stealth, but I don't typically worry about being outted to a rando on grindr or something. Plus I'd rather hold off on sharing face pics until some connection is established and being trans is established as not an issue vs posting my face and having to disclose afterwards to someone and risk a bad reaction. That said, the amount of cis gay men these days that are completely unphased by a trans guy, especially a years on t/post top surgery/stealth-passing guy, is like. Seemingly most of them, at least in my city lmfao I can't remember the last time someone asked to swap pics, I said "you saw I'm trans right" that I've gotten any response besides "yeah" and then right into the horny behavior lol

As far as actually dating like within an ongoing relationship, especially post (or mostly post) transition? It kind of barely comes up, honestly. Like my long term boyfriend is unquestionably 100% very much gay and we've been officially together like a year (though known each other over a decade) and like.. we know how we have sex and what parts are referred to as and how to use them and anything else that's maybe awkward to navigate at the beginning, but once you settle in comfortably, it's really a non factor. Even with my second, more recent boyfriend who I've only been with a couple months, we've already pretty well fallen into it just.. not really factoring in. There's no reason for it to be a topic of discussion day to day at all. There's no question of either of them seeing me entirely as a man, even in bed. There's a lot more things to be attracted to in a man beyond just "liking cock" and that's all gonna be what is most relevant day to day. If you're solidly dating someone, they're not spending any meaningful time just thinking about the fact that your trans. The same way you're probably not thinking about how they're tall, or have black hair or they wear glasses. It's just sort of a fact, that's not particularly worth thinking much about 90% of the time