This page will hold the Google Analytics Properties for testing and confirmation that it is linked to our site. It maybe that the property needs to be on every page of the site. But I am going to try and just link from this Support Test Page to start with.
The properties linked are listed below
2. Excel Workbooks - Testing - GA4 - G-2GTNBYMP0X ....
Not possible to link multiple properties to the same website for testing.