First check it all the way before going that route... maybe could be anything else wrong, I have no clue...
However like I said first start with a flash light, I mean if you see broken or bent pins you surely will know its it. If the problem is not the pins, then just remove the back plastic cover of the switch and re-connect the Micro SD port cable from the Switch motherboard and make sure it gets completely attached right and try again to see if the SD shows up after.
EDIT: You can also try first formatting as Fat32 with allocation size of 100Kb (though I don't remember exactly if this is the best right size for it).