I ran into this the other day:

  1. Open the Wallpaper settings
  2. Tap "Change Wallpaper"
  3. Tap "My photos"
  4. Exists back to the home screen

Maybe related:

  1. Open the Wallpaper settings
  2. Tap "Change Wallpaper"
  3. Tap "On-device wallpapers
  4. Only wallpaper is a black background (maybe this is expected?)

Pixel 6 Pro
Android 13
Stable channel
Build TP1A.220624.021.2022083000

    mheisig the on device wallpaper being only black is expected as the black wallpaper is stock and comes as part of the OS.

    I however cannot repeat the problem you are having, tapping 'My Photos' brings up the app picker and I can choose whatever app I want to source from. 🤷‍♂️

    Might be worth clearing any default apps you have set and trying again if the app picker doesn't come up and we will move forward from there.

    SYSTEM>SYSTEM>RESET OPTIONS>RESET APP PREFERENCES

    Just be sure to fully read the pop up, if you wish to avoid doing anything listed you will have to go through your apps individually.