Cannot install on modern Android phones

[ArtyIF]

I have an Android phone (realme 12+) running Android 14. Currently, its screen is smashed dead (dropped on asphalt without screen protector, no image, no touchscreen, no parts available), so I use scrcpy to use it. I tried installing GeoclueShare on it by drag-and-dropping it into scrcpy, but I got two errors. One is the following warning:

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This warning could be ignored by tapping More details and Install anyway, however, the following error shows up in scrcpy's console:

Performing Streamed Install
adb: failed to install /path/to/geoclueshare.apk: Failure [INSTALL_FAILED_DEPRECATED_SDK_VERSION: App package must target at least SDK version 23, but found 21]
ERROR: "adb install" returned with value 1
ERROR: Failed to install /path/to/geoclueshare.apk

I thought that maybe it's only blocked over ADB, however, I sent the APK to my phone directly and installed it using the Google Files app. After the Play Protect warning I got this error:

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This error message when using realme's built-in file manager:

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