Dropped you a file in the dropbox. Even the import dialogue will crash FCP. Anything you do to a large event will crash it, folks at the FCP team told me to reduce the number of items on an earlier OS or downgrade it.
Your crash dump is quite complex; I haven't seen anything like that before. On the thread 0 application-specific backtrace, with a single exception there are no FCP frameworks or classes listed. On frame 128 it references LunaKit which is an FCP UI framework. The rest of the call stack from frame 127 up to the crash frame 0 are all MacOS frameworks. There are apparently recursive calls in some NS (that means NextStep) methods. Those are probably signs of an anomaly.
In the concise thread 0 stack there is a call to NS_setFlushesWithDisplayLink which may be associated with using multiple monitors. We had a previous problem reported by well-known editor Thomas Grove Carter which was related to multiple monitors. In his case disconnecting those temporarily was a workaround. I had the same dual monitor config as him but I could never reproduce it.
If you have multiple monitors on the problem machine, as a troubleshooting step can you try disconnecting that and see if the problem can be reproduced? If so please send me that crash dump.
In the Thomas Grove Carter case, he eventually determined it was a combination of his dual monitors and the MacOS system setting "automatically adjust brightness". We think that was fixed in 10.6.5 but we aren't sure. Can you check if that is disabled on your machine (as an editor you'd normally want that).
If that doesn't help, I notice in your crash log you have considerable external devices connected to your M1 Ultra. Can you disconnect everything possible and try to reproduce the problem? I also have an M1 Ultra with multiple Thunderbolt arrays and so far haven't seen your symptoms, although I have one OWC Thunderbay 4 Mini with 4 x 4TB SSDs that will sometimes cause a kernel panic if I reboot with it connected.
If you are using SoftRAID please provide the specifics -- what version, what configuration on your arrays, etc. If any of your arrays have kernel extensions, let us know. If you could please run this terminal command and post the results here, it may find some non-Apple kernel extensions:
kmutil inspect | grep -v com.apple
Even if the above steps indicate a possible configuration issue, there is no question there are multiple problems in play. I've seen some of those myself, and will post more information soon.
For the others seeing FCP crash on Ventura when doing drag/drop import to a large even, try using the FCP import dialog as a temporary workaround. Please report whether that makes any difference.
For those using RED media make sure you are on the latest version of the Apple RED workflow, version 20, dated 9-26-22:
If you have Canon or other workflow/codec packages, make sure they are updated.
On Ventura the latest version of Apple Pro video formats is 2.2.4. The version can be examined in System Settings>General>About>System Report>Software>Installations, then on the right pane scroll down to "Pro Video Formats". It can be updated in System Settings>General>Software Update. If available it will automatically appear after a short delay.