All the 3 ISPs I dealt with in Hungary in the last 10 years provided 0 firewall capability for IPv6 in their integrated router/modem.

Once you start assigning the addresses, every compatible IoT gadget you have is reachable from the public web.

In this state, IPv6 is a pure security stepback for average residential users with 0 upside.

I can't take any comment seriously who is speaking of configuring a stateful firewall in a residential environment.