Besides Parallels Desktop and VMware Fusion, also VirtualBox won’t start VMs with AMFI disabled (just tried): only UTM seems to work without problems. As for trying to enable AMFI anyway, probably this would not permit booting the Mac (BTW, IIRC, it was so before the initial OCLP release for Ventura, when AMFI still had to be disabled: but this was fixed in 0.5.0); one could anyway try, if one has another always bootable volume, partition or disk, from which to be able to restore a working OCLP: but it’s probably better to wait for an official solution…
(BTW, in order to continue to use my VMs (all on an external Thunderbolt SSD), I created an additional 64 GB APFS volume, on which I installed macOS Monterey 12.6.4, Parallels and Fusion: thus, I can keep them up-to-date, in the meantime, until a solution is found for the macOS Ventura 13.3+ AMFI OCLP problem.)