It's more complex and nuanced than this what you've stated of course, why it's so confusing. Arguably, aside from security risk of the CCP having access to the data, banning apps is an leverage against the CCP having economic access to Americans to help influence the CCP to stopping their human rights abuses.
If the CCP had allowed the United Nations to visit the prisons/concentration camps to interview prisoners (etc) then this could have all quickly gone away, assuming the CCP was being honest about what was happening at these concentration camps and the UN could confirm that on the ground.
If the CCP had allowed the United Nations to visit the prisons/concentration camps to interview prisoners (etc) then this could have all quickly gone away, assuming the CCP was being honest about what was happening at these concentration camps and the UN could confirm that on the ground.