https://www.reddit.com/r/NintendoSwitch/comments/7jbzkd/bayonetta_12_on_switch_only_in_720p/
http://m.filmweb.pl/news/Bayonetta+i+Bayonetta+2+na+Switcha+bez+1080p-126184
I wouldn't really take this as confirmation.
http://m.filmweb.pl/news/Bayonetta+i+Bayonetta+2+na+Switcha+bez+1080p-126184
So, 720p60 in both games in both modes - tv and handheld.
That's the info we've got from our polish distributor of Nintendo - Conquest entertainment. If there are any journos from other countries who are in touch with Nintendo PR - can you verify this with your local contacts?
I wouldn't really take this as confirmation.