OPPO Android requesting ID verification before installing downloaded app

#1

message reads: f-droid wants to install “app name” please verify your identity… login button opens a “my oppo” window to manage my hey-tap account?. im guessing its a user error, can you enlighten me please?

#2

https://support.oppo.com/en/answer/?aid=2020324
this?

#3

i have unknown install on for f-droid