Developer verification will be enforced on certified devices with Google Play Services installed, which is the majority of Android devices. There are options to bypass the restriction:

Use a free, uncensored Android system like /e/os, LineageOS, or GrapheneOS that does not preinstall Google Play Services.

"Degoogle" by removing Google Play Services. If it is a system app, you can uninstall it using ADB.

Install apps via ADB. Google has already confirmed that ADB will continue to work in the future. You can either use ADB from a PC as described below or use a wireless ADB based installer like anyapk.

Set up ADB on your device

Enable Developer options on your phone: In Android settings, find and tap the Build Number option (usually at the bottom in "About phone") seven times until you see the message "You are now a developer!"

Return to the main Settings screen to find Developer options at the bottom (or it may be in System)

Scroll through the options to find and enable USB debugging. On some devices, you can use the hourglass at the top of the Settings app to search for "USB debugging".

Download ADB for PC (Windows)

Download these files into a folder:

AdbWinApi.dll

AdbWinUsbApi.dll

adb.exe

APK_Installer.bat

Download app APK

You will also need the APK file to install to your phone, e.g. from F-Droid. Save the APK to the same folder where you downloaded the above files.

Connect phone to USB and install app

Connect your phone to the PC via a USB cable.

You should see a notification on your phone to change USB mode. Set it to file transfer mode.

Open the folder where you saved the above files and double click APK_Installer.bat.

Select desired APK from list and install.

If prompted, check confirmation box on phone and agree to USB debugging from this PC.

Your app will be installed

Optional (recommended): Switch off USB debugging in Developer options until you need it again.

Lien article: https://github.com/woheller69/FreeDroidWarn