I dunno, from what we've seen on DS9 and Enterprise, Section 31 is willing to recruit operatives to fulfil their goals - we saw that in Malcom Reed and Bashir as Starfleet personnel, but also Koval, who was a Romulan agent.
A S31 agent like Alok Sahar, who operates outside the Federation and has the authority to recruit people to achieve the ogranization's goals, makes a kind of sense to me. A Deltan and a Chameloid both make sense from a spycraft perspective.
If anything, this iteration of S31 could show a progression from the out-in-the-open, "special forces" iteration of the group that we saw in Discovery, to the complete disavowal of DS9.
They announced the pivot to a streaming movie in April 2023.