This is where I recall Gate and So the SDF Fought there.

Or, as I sometimes call it 'Imperial Japan did nothing wrong and Colonialism is just fine as long as you're moral about it.'

This isn't every one of these fics by any measure, but this is a theme I occassionally see in manga, anime, and light novels. Unsurprising. The legacy of Imperial Japan is culturally contentious in Japan today. Inevitably that will find itself reflected in the fiction and media that culture produces. The anime for Gate actually has it better than the manga where it gets harder and harder to ignore the story as it starts justifying Japan's colonizing of a fantasy work and making allusions to Imperial Japan that are thinly veiled at best.

And I could rant for hours about the frequency with which people miss the Nazism analogies in Zeon and the Gundam Unicorn lightnovels were freaking insane on this front, bordering on political diatribes at times.

The anime adaptations have a tendency of toning these elements down.

It has bled over into the LITRPG space somewhat, though in a variant that is more lacking in consideration of its content than anything. These genres borrow a lot from Eastern popular media so the osmosis is to be expected. I wouldn't say the genre is racist or pro-colonial per se. I would say it is at times very unintrospective about its contents and tropes. The writers adopt the motifs of things they like without a hard look at any implications they may carry.

I could make that criticism about most fiction, especially the pulpier popcorn varieties. People are reading them for the power fantasy, and many of them frame themselves as 'young hero fights abusive power structures' kind of stories. This is more a case of unfortunate implication than intent (most of the time, anyway).

As to women and young girls, oh yeah. This is a thing that's way more common in anime and manga than western media and it's bled over in much more unsavory ways. I still remember Reddit from I don't even know how many years ago anymore when Church of Kuro wasn't a banned sub and if you think it's bad now you have no idea. It's still kind of bad.

Though western made stuff generally skips it. Lots of western works in these genres are made and written for people in the early-to-mid 20s and the stories reflect this. The cringy presentation of younger girls and teens or the fetishizing of adolescent bodies isn't nearly as bad as you'll find in translated works originating in Japan, South Korea, or China. And there we have a more blatant case of values dissonance.