"the cliched romance fantasy trope 'isekai'" Gotta say the first cliche and assumption that comes to mind with isekai definitely isn't romance personally, there are quite a few of those as well of course, it's the second association grouping I'd make, like she mentioned, often with villainess, but generic-fantasy-with-op-protag definitely reigns in more total works.
I guess if you're a woman reincarnating the romance trope is more likely, though. Though still, there's a couple generic OP ladies on the other side, honestly not enough, wish the generic OP men would diversify a bit.