Cannot add Matter device that was provisioned with the Echo border router

I have a Eufy E31 lock that I added as a Matter device to Alexa using the Echo border router. I’m trying to now share the lock to HA through the Matter integration. I picked Add Device in the integration, then Yes it’s already in use, then Other controllers and entered the setup code provided by the Alexa app. It’s not working - it spins for a while and then reverts to the setup screen. I do have IPv6 enabled in my Eero router, and Eero claims mDNS is on by default.

Can anyone give me any insight, things I did wrong, additional debugging steps, etc? Thanks in advance.