Who told you the 4-8 weeks? Was it from an official source, locally? (If so, probably right)
I really have no specific information but reports here, and I think some of these comments may be heavily weighted / affected by timelines in India, which seem to have been a different matter. (Some other countries too where need to send out-of-country like Iranian applicants to Ankara). Passports etc sent across borders just have more hurdles.
So seriously, grain of salt and YMMV and other caveats should be piled on. My estimate might be quite wrong on either side depending on location.
If you want a closer guess, you'd probably have to look in similar country/VO combinations as your own file.
But I think in most or at least more visa offices (excluding those really stuck with covid lockdown issues), it's eg 2-5 business days once in the visa office, and the rest likely just logistics back and forth.