All my papers have alphabetical author lists, but an award application asks for author lists to judge contribution
If you are concerned, you may want to include more information about the culture of coauthorship in mathematics.  For instance, you could enclose the following updated AMS culture statement.

As a mathematical "lifer," I want to be honest: the way that we handle coauthorship in mathematics does sometimes obscure the individual contributions of the authors.  On the job market, this is often circumvented by getting letters from one's senior coauthors describing the contributions you made.  You might consider doing that here, or that may be too heavy-handed for this case.

You could also talk to a mentor in your department and see what they think.  They may have more experience with what happens at the university level.