If it's the former, then you must know that Google limited the max quality to 720p in some regions due to the pandemic, some are back to normal when using "auto", while other regions are still limited, I guess where you live it's still under that limitation.
Is it the YouTube app or the YouTube TV app?
If it's the former, then you must know that Google limited the max quality to 720p in some regions due to the pandemic, some are back to normal when using "auto", while other regions are still limited, I guess where you live it's still under that limitation.