KVD21 DHCP/iPv6 Prefix Delegation and PFSense

Hola,

 It seems the KVD21 Gateway is a great device for basic Internet users. It is wise and understandable.
Unfortunately, It has no options for DHCP or iPv6 Prefix Delegation.
 

 Is there any other T-Mobile gateway available with more options? At least controlling the DHCP or iPv6 Prefix Delegation?

 I understand the Core network of T-Mobile is running over pure iPv6 and it is amazing!
But iPv6 Prefix Delegation should be available so we can technically get more freedom to use PFSense or other open-source gateways.
 

 I am interested in PFSesne because I have more control over my traffic to block the Ads/Tracker/malicious addresses on my network.
 

 The reason I am asking this question is that Part of my question is asked in community and there is no answer from T-Mobile!

https://community.t-mobile.com/other-devices-11/ipv6-prefix-delegation-44058
https://community.t-mobile.com/troubleshooting-38/prefix-delegation-41507

Gracias