It's likely designed to only use it, so you're probably SOOL. Try reinstalling the apk: https://m.apkpure.com/samsung-gallery/com.sec.android.gallery3d
Android
A place to discuss anything related to Android or Android adjacent.
INFO:
-
No attacking others based on their phone preferences. Criticizing OEMs/devices is allowed. Attacking users because a different brand/device works for them isn't.
-
Obvious spam will be removed.
-
Anything directly or indirectly related to Android is allowed.
Check Out Our Partner Communities:
It doesn't install.
Why go through so much hassel? It's the default system app. Many samsung services and app's are likely hardcoded to use it for stuff like that. It also excels in certain tasks like bulk image moving, deleting compared to Google photos. You won't get hurt just by having it installed.
You could try the Dark Mode Wallpaper app, from the Droid AppStore or from Github https://github.com/cvzi/darkmodewallpaper I use it on my Samsung Phone to change the wallpaper and it should work without the gallery app.
Thanks for the recommendation, but the app doesn't work in DeX.
Shot in the dark, but Gallery Go? https://play.google.com/store/apps/details?id=com.google.android.apps.photosgo
Sorry if unhelpful, as fat as I know a lot of apps don't have access into DeX