OnSuccess of the form, create a Variable:
Set(VarLastItems,FormName.LastSubmit)
Then on the Default of the dropdown1 put:
VarLastItems.Column1
Then on the Default of the dropdown2 put:
VarLastItems.Column2
Do same for the rest.
You can give a screenshot if you have issues
------------
If you like this post, give a Thumbs up. Where it solved your request, Mark it as a Solution to enable other users find it.