The shape of the hull looks similar to C28A exported to Algeria.
View attachment 113687
Definitely 054ish but definitely also not a 054A.
Already important details have emerged.
Helicopter hanger lacks the bezels used for AESA based target illuminators seen in the last batch of 054A.
Rear port windows point to VDS, TAS and TDS.
The main mast design has now emerged. It's thicker and more pyramidal, pointing to an integrated design. Lacks the arms used to hang ESM, navigation radar, IFF. Clearly meant to mount a large rotating radar on the top with an IFF ring underneath.
Secondary mast isn't there yet.