admin settings to change default document open behavior
SharePoint has setting to change the default behavioor on document open.
Admin can choose to open in online apps or desktop apps, at the collection level, and per document library.
OneDrive lacks such controls in the modern interface.
Global Admin does not have an option to choose the default open behavior.
Individual users do not have a modern interface for that. Users have to go to Classic Settings and find the option 5 or 6 clicks deep to change it, which is not user friendly.
OneDrive Global Admin:
Default behavior choices:
Open in online apps
Open in desktop apps (if desktop apps not detected, opens online as a fallback)
Checkbox: allow group to override default (on/off), default enabled
Checkbox: allow user to override default (on/off), default enabled
In additional to global settings:
Expose the option to change these settings also at the group level and user level, in the Groups and Users admin settings.