Set up a delegate to take your calls

On the Teams client click the ellipses "..." next to your profile photo to open "settings and more".

Select Settings > Calls > then under Manage delegates > Select Add a delegate.

Type the name of the person you want to add as delegate and then select them as Your delegate and 

Choose which permissions to give them, from the available options.

Your delegate gets notified about their new status.

Under Settings > Calls >Call handling and forwarding, you can now manage if/when you would like your calls to ring your delegates.