I am doing this exact thing, with the exact micro SD card in the Sandisk adapter. the only difference is I didn't format it to APFS first, and I have an M1 14in MBP, and, currently running Monterey.

If you were just running out of space on your memory card - here come some good news for you. SanDisk is going to start shipping 16GB microSD and M2 memory cards as early as next month.

Pro The humble SD card turns 25 as memory capacity increases one million times and speeds improve by a factor of 300. ... Sony Ericsson dumping M2 memory cards for microSD. News.

The Switch 2 is faster, and needs faster storage, so you'll have to use expensive MicroSD Express cards. The problem is, not only are those cards pricey, they're also quite precious—supply is short.