Not every game in the entire world needs to go on the Nintendo Switch. Not every game can be released on the Nintendo Switch. And, in Dark Road's case, not every game should release on the Nintendo Switch.
Also the games in the OP are either:
A) Cross-games with other major consoles or,
B) One time purchases
Final Fantasy XV Pocket Edition did require the user to buy chapters on mobiles but on the various devices it launched on, when it became 'HD', it was a one time purchase. The World Ends With You Final ReMix was a one time purchase as well.
Square Enix wants all of y'alls dollar dollar bills. Kingdom Hearts Union X revenue seems to be drying up so they're throwing a new mobile experience out, with presumably a new power scale, in order to rope people back in to spend, spend, spend. There are also constant almost daily updates (which requires data to download which phones with 3/4/5G can do) to consider.
Any Switch / PS4 / Xbox One release (unless it hits next gen) would require the entire game to be fully completed and repurposed to fit a one time purchase business model, or feature a microtransaction scheme that is acceptable to audiences. KHUX operates on "buy the weekly VIP jewels" to get weekly cash flows, while also starting and ending banners within 4 days with 15 pull guarantee to try and maximise profit. If they do something similar with Dark Road then this doesn't quite translate to a home console release.
Basically, they want money that either a one time purchase scheme doesn't guarantee, and it's easier to get people to buy into microtransactions when there's constant and easy pop ups and power scaling at all times, something hard to translate with a home console release
without it being incredibly in your face and offensive.