Sort a Multi-Select Lookup Field

I have a multi-select lookup field coming from one app to another. Currently that lookup data is being sorted on the printed report based on the added time of the form that's being brought in.

Problem: I'm ideally trying to sort the lookup data by a field value in that lookup form that is a Date/Time. If that can't happen, I'd at least like to be able to sort by modified date of the lookup form data (as it sits, I have to literally delete the entries and re-input them in the order I want them to sort by because it's using the "added time")

Things I've tried: I've placed a list function in the original app and then created a workflow (both "on submission" and "on input when created or edited) in the app that has the lookup, but it's not working. Chatted with Zoho and they're saying that a sort based on a multi-select lookup isn't possible.

OG App: "Scheduling"

OG form (that is the lookup): "Schedule"

OG field that I'd ideally like to sort by: "Start_Date_Time" or Modified Time of "Schedule"

App that lookup lives in: "Accounts"

Anyone know a workaround???