Adjusting alert preferences for messages, mentions, and activity within Microsoft Teams
Hello Helen
I am V. Arya, Independent Advisor, to work with you on this issue. Tenants are exclusive. You can't see what is happening in one tenant from another tenant. What you can do is to use Web Teams (Edge/Chrome browser - https://teams.microsoft.com/ ) for one tenant and Teams app for another Tenant. Then you can easily switch between them to see the activities.