142 x 12 is the standard for thru axle rear. Anything wider is considered "boost" or "boost plus" or one of the fatbike standards.

The first version, of the dropouts you linked, is going to be difficult to do a disc brake mount. They are not very easy to mount an IS brake mount on either the chainstay or seatstay. For seatstay mounting, an IS tab hangs off the back of the dropout. For chainstay mounting, you need to bend the seatstay , so that it come straight down onto the dropout and gives enough clearance for the brake caliper. Seatstay mounting will work fine with a post mount. I don't have any experience trying to make a flat mount work with those dropouts.