I doubt SE Japan would want to go that route. It wouldn’t be difficult to do because they have the infrastructure for it as seen with GOTG, but would it even be worth the money? How many people are clamoring to stream KH3 to their Switch in 2021?
GOTG is a new game so it’ll get some sales, but KH3 has been around for two years so it would need some sort of event or celebration of the series to generate some additional sales for it.
Not discounting the possibility of it, but certainly not in 2021.