If you wish to allow another person to answer your calls, you can set them as your Delegate in teams, to allow them to receive and make calls on your behalf.
Add a delegate to answer or make calls on your behalf in Microsoft Teams.
Select your profile photo.
Select Settings>General, and then select Manage delegates.
Select Your delegates and type the person's name.
Choose which permissions to give them, and then select Add.
Your delegate gets notified about their new status.
Under Calls, select Forward my Calls>My delegates to manage your permissions and make sure your calls go to all your delegates.
NOTE: unfortunately, delegation only works one way. If you set someone as your delegate, then they are not able to set you as their delegate. If you want to enable your calls to call multiple people in your office, you can set up a Call Group, and configure your calls to go through to everyone in the call group.