As far as I'm aware, nothing as been confirmed.
We know there are two "women-led" series in the pipeline, in addition to the shows already airing, but I doubt either one is Sisko related. I imagine one is the Section 31 show with Philippa Georgiou (previously announced), and I imagine the other one might be a Starfleet Academy series with Sylvia Tilly (Starfleet Academy series previously announced, Tilley moved over to Starfleet Academy in the latest Discovery season).
Allegedly, there were talks with Avery Brooks about doing something, and his only demand was that it included Cirroc Lofton as Jake. Whether it's its own series, part of Picard Season 3, part of another show (Lower Decks is going to have a DS9 episode), etc. is unknown as far as I'm aware.