Just looked up the 2020 TV ratings for Jays/Rays, and they were really bad. That could have been for a number of reasons (pandemic, election, no fans, etc), but that seems like a matchup that would get tossed in the 12:30 timeslot on ESPN2 or something. Canadian viewers don't count towards ESPN's ratings, and while Tampa gets good local TV numbers, I don't think their fanbase stretches beyond that. My guess is Toronto/Seattle might get the better timeslots if J-Rod plays.
But yeah, it really depends on what the official matchups are. ESPN is going to put the games they think will draw the best in the most desirable time slots, so based on the above matchups, the NL is likely getting top priority in that regard.