According to player reports, the Battle for Azeroth Pathfinder is still required to fly in Kul Tiras and Zandalar on live servers.

Battle for Azeroth is two expansions old with the launch of Dragonflight and when Shadowlands was released, Blizzard made Warlords of Draenor flying available to everyone with the Pathfinder still rewarding the mount.

However, now that Dragonflight is live, this does not seem to be the case.

The achievement still requires BfA flyting and the  Wonderwing 2.0 mount.