A small detail you may have missed from the Direct is that the Switch 2 is only compatible with MicroSD Express cards and it is not compatible with standard MicroSD cards.

MicroSD Express cards are

• The same size and shape as MicroSD cards.
• More expensive than MicroSD cards.
• More widely available in smaller volumes.
• Have more pins than MicroSD cards for faster data transfer.

I can easily see parents and children getting very confused by this. Please make sure people are aware.

EDIT:

How to identify a MicroSD Express card

• They have this EX logo on them.
• They have an extra row of pins.

If either of those things is missing, it is not a MicroSD Express card, and will not be compatible.