Nintendo just uploaded Mario Paint to Switch VC. It's on both the Switch 1 and Switch 2, but is only playable on Switch 2 due to the fact that you need the Mouse for it. It's not enough you paid for Switch VC, they're leveraging it for the benefit of new consoles. Expect VC versions of Wii U games to only work on the Switch 3, but still be uploaded to the Switch 2.
You know what they could have done on Switch VC which would have been low effort and would be easy goodwill? PAL ROMs of games they've already uploaded. Among retro collectors, PAL games tend to be the most valued and expensive due to working on the most different consoles (a game from Germany will work on a console from Australia) and the most available languages as well (many of them have at least EFIGS as a bare minimum). If they're "too slow" then Nintendo can just overclock them to make them nearly as fast as NTSC like what they did even as far back as the NES and SNES. Handheld PAL games won't even need this due to them not having speed differences. And right now, they have so few of them on offer, they aren't even available for PAL regions with the exception of GBC and GBA.
This means most people, even from Europe, are effectively gatekept by a language barrier from N64 games, which put a much greater emphasis on text and dialogue. This artificially increases the challenge in most games from Pilotwings 64 (can't read instructions if you don't understand English) to Banjo-Kazooie (Furnace Fun now has an artificial layer of extra difficulty where you have trouble knowing what the questions/answers even are). Not to mention the more-common-than-you'd-guess uploading of Japanese games with completely un-translated text, which Japan's RICHEST COMPANY is unable to do anything about (note that Sony gives you both American and European versions which you can switch between when you buy a PS1 game on PS5 and Sony doesn't have as much money as Nintendo).
Nintendo's long-held tradition of not caring about anyone other than North America and Japan stays the course. They need all the help they can get when it comes to other regions not already on board with them, as well as people pirating their old games and getting objectively better treatment (they have access to PAL games and fan-translated ROMs, even in languages other than English).
Seriously, can they not just AI translate these games? Even small publishers like Edia can translate entire JRPGs for the Turbografx-CD.