Apparently, Ukrainian naval drones (MaguraV5s) have taken out the Caezar Kunikov, a Project 775 landing craft. This is an older class of ships (the CK was commissioned in 1986) but it still highlights the vulnerability the Russians have vis a vis surface drone swarms. It will also be interesting to see how other navies learn (or fail to learn) the lessons of the Russo-Ukraine War.
https://www.dw.com/en/ukraine-update.../live-68251728