You can try:
Leave the clone in the repeater as it is, to show the clone field when collapsed
In the field group that you are cloning add the class “-collapsed-target” to the field(s) that you want shown when collapsed.
Not sure if this will work. But this is how you can get multiple fields to be shown when collapsed in a repeater without clones. You set one field to show when collapsed and then add this class to other fields you also want shown.