Visa Retrogression - Help with timeline

[aggaayush]

I had filed my AoS family based application in Oct 2020 under F2B category.
Got my work permit, etc in Sept 2021 and had successfully cleared my interview in oct 2021.

As the process is in retrogression, wondering how much time would it take for my file to get processed.

I-130 was filed in Mar’16 and current processing dates are Sept 2015.

Any information/thoughts/experiences would be appreciated.