@HoneyPopper it's mostly the irl cooking show trend bleeding into manga, then into isekai genre
also influence by manga editors: "mangaka-san, cooking series sell well, and isekai is the new hotness, so why don't you do a combination of these 2?"
just 2 years ago people were joking about cookie cutter isekais
now we're in the next level of inception: cooking isekais
and this is coming from someone who likes the other fenrir cooking isekai manga