Any way to extract data off or iMac that won't boot (Ventura beta bricked it)

Installed the first beta for Ventura and it completely bricked my iMac. Did all the usual stuff, DFU, SMC reset etc. I know I'll need to wipe and start over, but how to recover data when it won't boot or go into recovery or target disk mode or anything else (just endless reboots into internet recovery). Do I have to open it up and pull the disk?

Interestingly the beta and all subsequent ones all worked fine on my MBP

Oops, you did not make a backup before installing beta OS ?

Any way to extract data off or iMac that won't boot (Ventura beta bricked it)
 
 
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