If you aren’t going for serious, age gaps don’t matter at all (barring age of consent obviously).

I know a guy that had an off and on partner that was in her sixties when he was in his twenties. Just fwb territory. They had fun, neither wanted anything deep, and that let them carry on for quite a while before they both found long term partners.

Being honest though, even for serious relationships, age gaps only matter when one party or the other isn’t at the point where they can do the work that relationships take. And that can be true of older, and mature people. You can lose the willingness to work at things through life, and even barely adult people can do that work very well. There are challenges to age gaps, but they’re far from insurmountable.

But for short term dating and sex? Doesn’t matter. Worst case, you run into differing expectations about what to do together.

Go for it. Be up front, be honest. You might get rejected, but that’s always possible.