Nah. There are lots of things you’ll need to know.
Does it use SLAAC on the WAN side or DHCPv6? How do I get a range for my lan then, DHCPv6 prefix-delegation? Or maybe it’s statically assigned somehow. Some carrier’s just use link-local ok the WAN, with no public v6 just RAs for the link-local, and a GUA block via IA_PD.
Regardless there are too many ways this is done, and this hampers adoption as it’s not just the “switch it on” operation you suggest.
All of those are handled automatically. The only people who have problems are ones who want to configure manually. More importantly, this is no different than IPv4 where have DHCP or manual.
Nearly every ISP uses DHCPv6-PD cause harder for manual configuration. The range is in the DHCP-PD, your router picks a subnet. The WAN address is automatic, and don't care about it cause never see it. Mine is link-local and hadn't known until I checked.