are you sure your not getting confused with the TM7? Which you can get from your local immigration office or online? The TM6 has not been available or required at airports since covid when it was suspended
the TM6 will only be implemented on the 1st of May as it currently stands. If you arrive in thailand before that date you do nothing, no change, no TM6
I would suggest double checking your wise account so you know it truly has been suspended. Also you might want to talk with your uk bank I assume where you moved the money from to wise and see if they can help if your wise account has been closed.
It depends what you mean? The old TM6 card that you used to fill in on the plane as you landed is being re introduced on 1st May but in electronic form, so I would watch out for that if you are going to arrive after this date.