So I did a bit of YouTubing and found several examples of Switch gameplay. First, I should give credit to TT Games, because it seems LSWTSS is a fairly decent Switch port. Looks to run at a stable 30fps at 720p resolution docked, and YouTubers playing it indicated it runs similarly in handheld mode.
But even just from a quick glance, the difference between the Switch visuals and presumably those of the more powerful hardware that have been featured in promotional pieces for the game are significant enough I may very well cancel my Switch pre-order in favor of PS5. Handheld is an awesome way to play, but I really do want to cherish all the details put into this game.
SPOILER ALERT: here is a link to one of the videos I watched. The channel has at least one other Switch gameplay video published.