I’m considering flying the following all on separate bookings and hand baggage only (just seems the best pricing for an Avios redemption given the mixed classes

PVG - HKG in CX J (3 hour layover)
HKG - DOH in QR F (8 hour layover)
DOH - VIE in QR J

Will I get Al Safwa access in DOH due to my arriving in F albeit my onward ticket (a few hours later) will be in Business?

Will I be able to get mobile BPs, or if not where will be the best/right place to get them printed for each leg? Don’t know if the desk at PVG will do it, or where in HKG or DOH. Obviously I need to get through connections at each place.