There are some changes to that in 7.15 beta:
http://forum.mikrotik.com/t/v7-15beta-testing-is-released/174120/1
What’s new in 7.15beta4 (2024-Mar-04 08:04):
*) dns - added VRF support (CLI only);
but at the moment I have not seen any related docs/tutorials/explanation on how to use this new feature.
It seems also that there is a bug introduced in 7.14.x that has been fixed in the 7.15 beta:
What’s new in 7.15beta6 (2024-Mar-08 08:23):
*) vrf - fixed VRF interfaces being moved to main table after reboot (introduced in v7.14);