At this point I feel like they are just saving money by waiting it out and having NISA pay for Switch and PC ports that they can then later release in the Japanese homeland without any extra effort or much money spent on their part.
I don't know what they are doing. The Switch CAN run these games, maybe with some graphical downgrades, but heck the Switch runs Breath of the Wild, Mario Odyssey, and 36282 probably more technically impressive third party games that I can't think of right now.
This doesn't affect me because I also have a ps5, so I can easily play the games. But if I had a choice I would get them on Switch. The only reason I haven't so far with the ones available is that there was still a gap between the western ps4 releases and the Switch and PC ports respectively. From what I understand, that will be a thing of the past starting with the Trails from Zero localization - so you already know which system I'll be getting the series on from now on.
Why Falcom themselves doesn't capitalize on Switch-Land (aka, Japan), idk...