Which strips are you using specifically? Please show the link to that product.
The last code I sent does not work at all?
Will it not work if you replace it with another XIAO?
Does it not work if you change pin10 to another pin?
XIAO can do “blink”, so basically I don’t think it’s broken. If you have a simple LED that you can use to check the I/O pin activity, you can blink it to see the status of the I/O pin.