One of my calendars doesn’t sync

What I did: sync with calendar for iPad my outlook calendar for my work. The calendar is showing with out problem in calendar.

What happened: calendar from my work is doesn’t appear in agenda app as an available calendar.

What I expected: that my events from that calendar appear in agenda app.

Things that might be helpful to know (Agenda version, OS and model, etc):

iPad 8 gen
iOS 14.6
App is up to date with premium access

Unfortunately this might be due to the way your work calendar has been configured, have a look at this post to see if this is indeed the case: Dates, Events, and Reminders