Possible to set DHCPv6 option 16?

I am investigating how to deploy TR-069 setup with my PPPoE Customer CPE and I found that the ACS url can be set with DHCP option 60 or DHCPv6 option 16

I am not using DHCP for CPE but prefer to use PPPoE, however I am currently passing IPv6 prefixes to the CPE by way of DHCPv6 PD Pool

It would be awesome to be able to add option 16 to this for ACS config

This feature is now only in RuterOS 6.42 RC

*) dhcpv6-server - added DHCPv4 style user options;

https://mikrotik.com/download/changelogs/release-candidate-release-tree