This is the one I use and haven't had any issues with it:https://www.amazon.com/gp/product/B06WV5YJ6H
Used it with the 4K60S+ and the HD60S+. Have a PS5 and a Switch going through it at the moment.
If you need more ports, I have 2 of these. Solid build quality and work like a charm. The only annoyance is the auto-switching which can't be turned off. My Chromecast decided to randomly reboot twice now while I was playing God of War and it switched over to that input. Guess what's in my drawer now!
So I had my NES Classic working fine through an old HDMI Switch (https://smile.amazon.com/gp/product/B0049SCB2Y/), but I am in the process of upgrading to 4K and got a new 4K switch (and receiver) (https://smile.amazon.com/gp/product/B06WV5YJ6H).
Everything works in the new 4K Switch - except the NES Classic. I get audio but no video. Hell, even my RetroPie works (Yeah I have a RetroPie and an NES Classic). It's so weird. Ah well,I can just hook it directly to my TV I guess. Still weird.
I have this one. Bought it in 2018, it still works. The auto switching can be a little flaky at time but other then that it’s been solid. https://www.amazon.com/dp/B06WV5YJ6H?ref_=cm_sw_r_apin_dp_S1711E8K2QSM98ZJNJH8