Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Chijioke,
Based on my test, you can't change the AddressDataSource value. To lock on the location of addresses, you can connect it to an Address Input control or a dynamic collection with Latitude and Longitude.
You can set the dynamic properties of the location in ItemsLatitudes and ItemsLongitudes in the Map control based on the field names of the collection in Items.
Here is an example for your reference.
I created a Dataverse table naming Geographical Location as follows and I want to show the location on Map when I click on the specific city.