Can a feminine man be dominant?

Of course. Gender expression doesn't have anything to do with sexuality or kink-orientation. Just the same way a woman can be a Domme and a man can be a sub.

If you are asking can you judge how a man performs in bed based on how he appears elsewhere, the answer is "No" and resoundingly so. For a start, many gay men do not engage in anal sex so the idea of "dominant" and "submissive" doesn't apply and those who do indulge are very likely to go both ways. It is called being "versatile".

of course, because there are many different ways to express and behave with masculinity. sexual and romantic performance is just one aspect

mhmm