Cant Edit my Calendar

i tried looking through the forums but none of the posts seem to be relevant.

my calendar is created as a page. whenever i go to edit the calendar page no options appear to edit it. all i see are revisions at the bottom.

i am part of a website committee and new to wordpress.
the person editing the site before me is gone and out of contact.

does anyone know how to edit a calendar as a page?
i say “as a page” because i dont think its a plugin or a widget.

any help is appreciated
thank you!