Is a double pole, double throw switch correct for my spa cover motor?
simulate this circuit &ndash; Schematic created using CircuitLab

Turn power Off before reversing direction.

Normally a 3 position DPDT switch with Center Off is preferred.

Here is a Mom-Off-Mom rocker switch 20A 120V
https://www.digikey.ca/product-detail/en/cw-industries/GRB260K101BBNN/CW129-ND/2349709