I have the same problem these sensors are built in. But no App is on the Phone for the sensors. For hygrometer, thermometer, barometer on Google Store are Apps available. But for very much more interesting sensers Air quality and UV meter are nothing availebel. These are advertised features of the Phone.
Blackview Admin please provide apps for the features.
There's a video on Amazon that shows these features, but I suspect they're referring to the BV9900 (not Pro), which the Blackview site seems to say has UV and hygrometer. (I don't know about thermometer. Haven't seen that on any of their phones.) I'm surprised the Pro doesn't have these features if the 9900 does, but that's what the site says. I hope the next Pro model has them all.