Hellblade and Octopath meet their 30fps target almost permanently on Switch, according to DF's testing.
I played Octopath 140 hours and there were many, many framedrops I could see with my own eyes. 30fps is still unacceptable for a 2D pixel graphic game and even more unacceptable for a company which made many 60fps RPGs back in the 90s. Of course I know it's not the same team within the company... but... you know... it's a shame that they don't pass their experiences on a new team.
Another example is Bloodstained which seems to have a terrible performance on Switch (screen often freezes for about a second). Of course, it always depends on the developers how the game runs. If Dragonball FighterZ has 60fps, then they made a good job. I don't say it's not possible to have a good performance with UE4 on Switch, but most third parties and Indies obviously can't handle it. Programming is always a weak point in small studios. And of course there are also exceptions like Shin'en.