In Outlook, a "delegate" can be granted access to your calendar or other folders. You can also allow a delegate to respond to meeting invites on your behalf.
The following steps from Microsoft will work in most versions of Outlook:
https://support.microsoft.com/en-us/office/allow-someone-else-to-manage-your-mail-and-calendar-41c40c04-3bd1-4d22-963a-28eafec25926#__toc305134742
For assistance, contact the Service Desk.