I double checked: this was indeed WWM's multisig address.

I wish! This means the "hit by a bus scenario" didn't happen. The funds were moved in 8 transactions, to 11 different addresses. One of those sent the funds to a different address again.
I noticed all 8 transactions used round fees. That's interesting, that means someone manually entered the fee. Before WWM disappeared, the last automated transactions had fees based sats/vbyte instead of round numbers. Now they used 15,000 to 75,000 sats transaction fee.

Escrow funds are still (intact.