So a quick note.
If the show isn't canceled, I'd say be prepared for the chance that either the show won't get as much promo and support as it's had, or Marvel will plan on introducing new characters and removing/demoting notable existing ones.
I'm basing this largely on current activity out of Marvel with the comics and merch. None of the characters from Gifted have a big presence in the X-Men comics/merch lately. Specifically, Prisoner X kinda betrays this attitude. They took an idea from season 1 Gifted's use of Polaris, made Bishop the lead, and made Lorna a supporting character. If Marvel planned to be more supportive of Gifted, you'd expect them to have Polaris as the lead of Prisoner X to make a bigger attempt at drawing in the show's audience.
This could've also been just one reason why Lorna wasn't handled as well in season 2 (as I've seen other people say; I didn't watch it so I don't know). Diminishing audience attachment lessens the blow when getting rid of or demoting a character.
P.S. Remember this is not a statement of guaranteed outcomes. It's possibilities and hypotheticals to be prepared for.