How to add a Form from a Private Group into a Teams Channel

Hi,

I created a number of MS Forms for our company to use and then moved them into a Private Group so that I was not the only person who could administer them.

I'm now trying to add them to a Teams channel so that I can collect responses from users but they are not showing in the "Add an Existing form" list.   I can only see "Personal" forms.  Is there a trick to be able to add them to teams?

Cheers,
Melissa