Why can't I see my AirTags in Items on Find My?

I had lots of air tags in find my, I then shared them with my wife and now its only her devices that are signed in to her iCloud account that can view them, it still shows my iCloud account as the owner on her devices, I can see all my devices in find my but no air tags in Items.

My phone keeps alerting me of AirTags found near but will not let me add them.

I hope you can help

Many thanks

Chris