Yora
Legend
Having recently done a deep dive into the region, there certainly are some stylistic similarities. They are not drastically different.Folks here focus more on Greyhawk, but I think Robert E. Howard's strongest influence on D&D is the Forgotten Realms setting, most specifically the Unapproachable East, and to a much lesser extent the Old Empires region.
Algarond, Rasheman, Thay, Narfell, very big Conan vibes.
But I never made any connections between the East and Hyborian Age before. Thay and Stygia I can very much see. That could have been an inspiration.
Narfell and Archeron, maybe... But Narfel was originally so little developed that I'd find that to be a bit of a stretch.
What's there about Rashemen, Aglarond, and Thesk that you think feels Conanesque?