DHCP Relay over Routing-Based IPsec in SFOS 19 not working

problem description see here:

 DHCP Relay over Routing-Based IPsec in SFOS 19 not workin 

I guess there are no plans to "add this feature" in future?

Documentation is missleading:

https://docs.sophos.com/nsg/sophos-firewall/19.0/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Network/DHCP/NetworkDHCPRelayAdd/index.html

There is no statement that clearly says that it's not possible to route relay requests over route-based vpns.

There is only a note:

Currently, you can't create a DHCP relay on route-based VPNs. So, XFRM interfaces won't appear on the list.

This refers to local interface for dhcp request.

Maybe sophos should make documentation more clear to avoid time wasting.