How do we see the last used date for any activities within a Project in ADO

Hi,

I am trying to maintain the unused projects within ADO as it appears that a lot of projects needs to be removed due to inactivity.

I can see the last used date within the projects but it appears to be incorrect as I have been using certain projects on a daily basis but the last updated date seems to show last used was 3-4 months ago.

I am not too sure if only title changes/description changes will modify the last updated date, but I need to see the last updated date of the project from users using the work items / boards. Is there a way i can do this?