Hi KyleFilter,
Thank you for the detailed reply.
When you move the tab from the local drive file to the file on Teams the formulas, the type of value will be displayed as the following picture:
Then when you try to change the source of this moved tab, the Teams file(I named the test file in Teams as "teams.xlsx") will not display in the Change Source box:
There are two workarounds for this problem:
Workaround 1:
If you want to use changing source, then you can open the Excel from SharePoint Online first to get the location of this file. Then you can open the file location in SharePoint.
Then copy the URL of the red line(https://m***.sharepoint.com/sites/Staff/Shared%20Documents/), open the Change Source box and paste the location to the box, press Enter:
However, this method has a disadvantage that it may be necessary to keep the file connected frequently. Otherwise, the data will fail to refresh.
Workaround 2:
This is a tricky but quick method, this method can replace all in the file at once. You can directly use "Find and Replace" feature in Excel, for more details, you can check below picture:
Best regards,
Jazlyn