Assign DHCPv6 address to PPPoE interface?

General questions
,
1

I’ve got DHCPv6 PD working from my ISP, however they also provide the IPv6 address for the CPE over DHCPv6 (as an option 3 non-temporary address).

Is it possible to assign this to the PPPoE interface?

I guess I’m trying to acheive the equivalent of:

set interfaces ethernet eth0 address dhcpv6

but on the PPPoE interface itself.