Hey there, my name is Ajibola and I'm excited to help you today!
If the Teams group was created as an Office 365 group, it should have a corresponding group calendar in Outlook. You can add this calendar to your Outlook calendar by following these steps:
• In Calendar, on the Home tab, in the Manage Calendars group, click Calendar Groups > Create New Calendar Group.
• Type a name for the new calendar group, and then click OK.
• Under Address Book, choose the Address Book or Contact list from which you want to pick members of your group.
• In the Search box, type the name of the Teams group, and then click Go.
• Select the Teams group, and then click the Group Members button.
• Click OK to add the group calendar to your new calendar group.
Note: You might need to translate the page content in the link shared below.
If you have any further questions or need additional assistance, please feel free to ask. I'm here to help!
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Kind regards
Ajibola