Removing a user from group chat

Recently one of our employees left and their account was removed from Zoom. They no longer appear under User Management. However, they still appeared in Channels and Group Chats. I was able to remove them from the Channels through the Team Chat Management -> Channels by adding myself as a channel admin. However, I do not see a similar mechanism for Group Chats.

I am a full admin on out Zoom account.

Does anyone have any ideas on both why the user was not removed from all of the channels and group chats, and how to remove the user from group chats that they are members of?

Thanks,

Andy