Per el goog it seems like it needs USB-C/PD, so any "modern" USB-C-to-USB-C will probably work, this was likely a remembered experience of mine in the more USB-A to USB-C era with random USB-A wall-bricks that weren't matching the switch's expectations.

And agree how awesome it would be if it were "just a USB-C device", but if you put yourself in Nintendo's shoes there are some fairly rational desired outcomes that making it dock-centric rather than encouraging "loose on a tabletop with an unknown number of cords plugged in and going different directions".

i definetly charged mine last week with an old brick from way before USB PD, it takes an ungodly amount of time (same as with my phone)

i really have to buy a couple of new ones