Zoom option not showing up in Outlook App for iOS

I have the Outlook app on my iphone to receive email from work as well as to access calendars for the executives I work for.  I used to be able to create zoom meetings on behalf of each executive on their calendars from my phone.  It's set up as I have shared access to their calendars.   However, for some reason, now I can only set up zoom meetings for myself (my own zoom room), but the zoom option no longer appears when I try and set up a meeting for them.  The zoom and teams option used to be available as a choice under Location when I click a slot on their calendar to set up a meeting.  Now there's only the Teams option for them.  I can do it perfectly fine on Outlook on my work computer.  Even the IT department doesn't know how to fix this issue and get the zoom option back.