Can we uninstall and install 2.0 applicaitons without upgrading?

Hi Guys!

Greetings!

A quick question reg Attention: Deprecation of Marketplace Platform Version 2.3

I have a customer whose application is currently built on Platform Version 2.0. Would they be able to uninstall and reinstall the application without any issues, or would they need to upgrade to Platform Version 3.0 before reinstalling?

Thank you.