If adding multiple apps is hardly a problem, we have to remove apps from the folder one by one on the LG device, but it's not possible to edit a season.

Android 9 | LG UX 9.0
Remove app -  Open desired  Folder
Remove app -  Tap on  Manage
Remove app -  Unselect all desired  Apps
Remove app -  Confirm with  Done
  1. Open desired Folder
  2. Tap on Manage
  3. Unselect all desired Apps
  4. Confirm with Done

LG Instructions