[FairyKing]

I think the big challenge to a toku isekai would be the costume and locations. Like, for something in the real world (or close enough to it), you can just dress the characters in actual clothes and film in real places, but the further removed from that you get, the more you have to spend on creating fantasy costumes and either building fantasy sets or finding locations that look like the fantasy world (or probably a mix of both).

It's definitely still possible, but because isekai is so oversaturated right now and has such a stigma of being derivative wish-fulfillment trash, I can understand why toku producers would be reluctant to sink time, money and work into a series that could easily flop.