When Dragon Quest XI was announced in 2015, it was announced for PS4, 3DS, and NX (Switch). This was a good year and a half before anyone knew what the Switch was and certainly LONG before anyone believed the Switch would do the numbers it's doing now. So they were clearly committed from the get-go. And last I heard, the best selling version of the game in Japan was the 3DS version.
If inferior hardware wasn't an issue for Square Enix back then, why would it be an issue now? Especially when the Switch is white-hot, selling far more and at higher rates than the 3DS or PS4 ever did, and blowing everything else out of the water?
Hardware Comparison Threads:
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PlayStation/Xbox/Switch: 2022 Edition
PlayStation/Xbox/Switch Hardware Battle: 2021 Edition!
PlayStation 4/Xbox One/Nintendo Switch: 2019 vs. 2020
PlayStation 4/Xbox One/Nintendo Switch: 2018 vs. 2019
PlayStation 4/Xbox One/Nintendo Switch: 2017 vs. 2018
PlayStation 4: 2015 vs. 2016 vs. 2017