Can't imagine this would be much of an issue. The question would be does Southwest arrive on time usually? A connection with no immigration/customs/security in Tampa would be pretty simple.
The OP is asking about a small Mexican airport that it appears neither Southwest nor Copa actually serve so connecting would be quite a pickle indeed.
Maybe the flight is into SAP which also would be not much of a connection issue again if on time.
Ex-US Copa is not doing the extra gate check silliness they do in PTY for US/Canada flights.