Gabranth's first and last cutscenes in the Bozja questline take place in occupied Valnain, which is his personal capital during his time as Legatus. In an interview, Matsuno said that if they come back to Dalmasca, it would be specifically in a time gap after Bozja continuing where it left off. Yoshi-P himself said in the same interview that future Dalmasca content would end up being story content like the trip in Cid's memories with a trial at the end like our fight against Varis.

Fran has less of a role in Bozja than in Return to Ivalice, but she still shows up and ends the storyline with an open-ended invite to continue everything in Dalmasca. Considering how the Field Records end, Matsuno and Yoshi-P's comments and their lack of interest in yet another "liberation" storyline, and the main characters of Dalmasca being in the Bozja storyline, we're probably not going to see a whole expansion take place there.