> but not until you navigate to the hidden settings and enable them
This used to be the case for older Android versions, but isn't anymore. Currently any attempt to install an APK from an app without permission to do so will pop up a missing permission warning with a deep link into the relevant settings page with a switch you can flip. Flipping the switch will initiate the installation of the APK. I can't imagine sideloading being any easier without removing the permission barrier entirely, which seems ill-advised.
This used to be the case for older Android versions, but isn't anymore. Currently any attempt to install an APK from an app without permission to do so will pop up a missing permission warning with a deep link into the relevant settings page with a switch you can flip. Flipping the switch will initiate the installation of the APK. I can't imagine sideloading being any easier without removing the permission barrier entirely, which seems ill-advised.