Wow! I just went down a crazy rabbit hole trying to find a way to get our JSM customers who interact with multiple portals / projects, to be able to filter their requests more nicely.

Currently you can only filter on status, participation, and request types. Each project has several request types, and the drop-down menu has a limit on the amount of items it displays, despite the customer having access to more projects and their request types. Customers have to know what they're looking for, search, and then check all the boxes for the request types of that service project. They also are unable to save their filters there so they have to repeat these steps every time they want to look at only orders from a specific portal.
I was hoping to solve this quickly with Forge, while Atlassian determines if this is something they will work on (JSDCLOUD-16200) - duplicate of JSDCLOUD-10805 which was marked as Won't Do)
However, Forge doesn't seem to have any way to modify the request view for customers in the JSM help center.
This just makes it really difficult to get buy-in on centralizing services and experiences, and instead promotes the desire for entirely separate JSM sites and/or tools (beyond Atlassian), which then makes customers have to go to multiple places to get what they need.
Open to any suggestions, if anyone has any.