Hi!
Not possible today, however there is a uservoice open here
https://microsoftteams.uservoice.com/forums/555103-public/suggestions/38030188-view-and-manage-deleg...Would recommend to vote on it to push it up the agenda. Also to raise at the next AMA. Delegate permissions on calendars and a calendar which operates like Outlook has been called out a number of times on uservoices. Microsoft is working on something per the one here
https://microsoftteams.uservoice.com/forums/555103-public/suggestions/18893194-teams-needs-a-real-ca...But whether this includes delegate permissions is unknown and not confirmed.
Hope that answers your question!
Best, Chris