A: Yes, all Reno models use the same logic. However, Reno 10 and newer have the strictest Fastboot locks.
OPPO locks Fastboot completely on many Reno models (especially Chinese variants and newer ColorOS 12/13 updates). If you see "Orange State" or your phone shuts down after 5 seconds, you cannot access Fastboot unless you officially request a "Deep Testing" unlock from OPPO. How to Open Fastboot Mode on OPPO Reno
However, OPPO phones are unique. Unlike stock Android devices (where holding Volume Down + Power works), OPPO disabled the hardware key combination for Fastboot several years ago. A: Yes, all Reno models use the same logic
How to Open Fastboot Mode on OPPO Reno (3 Easy Methods) How to Open Fastboot Mode on OPPO Reno