Regardless of hardware or software, not having 25 FPS is silly.It can be software issue as well. Probably due to Google being behind in supporting camera hardware and features in Android’s own camera APIs. In Android world, each OEM ended up doing their own thing for their camera software. Even Xiaomi had to do their own camera app on their Android One models since Google’s camera API back then didn’t even support dual lens setup.
Without proper API support for the actual camera hardware, 3rd party apps automatically suffers. This is why Snapchat and instagram in Android are poor compared to iPhone, since they were simply taking screenshots instead of actually using the camera APIs.
Samsung sells phones to Asia where the 25 FPS PAL standard is used. Millions of customers in this region will wonder why the lights are flickering in their videos recorded on Samsung phones but not iPhones.
I haven't see the specs sheet of S22 yet but hopefully they added 25 FPS