Customer Site DFF and How to relate and default a value based from the value of another field

Summary:

We have a requirement to add new fields (DFF) in Customer Site i.e. Store ID and Store Name. Please confirm if this is feasible.

Then in Lease - Asset Tab - Additional Information Section, we added new DFF (a) Store ID and (b) Store Name. Then requirement is after the user selected a value in STORE ID, the STORE NAME should be automatically populated/defaulted with value. No manual intervention. Please confirm if this is feasible and how we can implement this.

Please see attached for screenshot.

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