mi 9 48mp raw 3rd party apps open camera

Hi All I've been looking for a phone camera to shoot 48MP RAW for 3rd party apps so I can use Open Camera. I have a P20 Pro, but Huawei don't offer any RAW options on this phone for 3rd party apps. I've been chasing them for over 3 months now and they say nice things, but no commitment to...