Not sure I understand the user specific row id part. I don’t think you can have a row id in a user specific column. A row id column is it’s own thing. When you have Row IDs enabled, whenever a new row is created, Glide will auto-generate a row id for that row. If you are adding data to a sheet outside of the app, usually once the data sync’s to glide, it will generate the row IDs and eventually will sync back to google with the new row id. If you are using a free app, this sync may not happen until somebody does something in the app. If you have a pro version, you can set it up to sync when someone is making changes in the app or every few minutes while the app is in use.
It should update with Row IDs eventually.