Updated to macOS 15 yesterday morning. Since then have had multiple crashes of "idecachedeleteappextension" - 27 crashes over the last 6 hours. It's becoming a bit of a pain.
Doing the XCode dance seems to have fixed it here too. Disappointing that Apple can't keep their own software playing nicely.
As for the reporting, each crash seems to be auto-reported to Apple, and my own computers alone seem to have been reporting about 1 crash per hour for days, if not weeks. So I doubt that adding a Feedback Assistant report will help.