In terms of scheduling a meeting, you might want to schedule one on their zoom calendar
and then send an email saying that you have scheduled a meeting on such and such a date and provide the necessary background in the email. (The follow-up email is optional; I’m sure that since most people schedule via the zoom calendar that they are used to “thinking on their feet” and don’t need to have detailed information for the initial meeting.)
I say this because I have found that sometimes it takes a lot longer to set up a meeting via email, and I am thinking that getting the meeting sooner will be better (but of course I could be wrong about this). And if the meeting occurs and the dean needs more time to address your situation, then you are always able to schedule a follow-up meeting.