He 100% has Future Sight,
Haki Mastery is Ranked, for example CoO comes first & then CoA,
Meaning you can find People with only CoO, but you can't find People who learned CoA but don't know CoO,
Cuz you need to first Detect Haki before being able to Harness it,
Same thing for Advanced Techniques, you can't learn Barrier without already knowing Hardening,
And also CoO, i believe you can't learn "Telepathy" which is to make your CoO reach beyond it's original containment (just like Barrier does for CoA), unless you also have Future Sight already,
In other words, any Character who learned "Telepathy" CoO also have Future Sight,
Katakuri showcased Telepathy in Film Red & He is indeed FS User,
Yasopp also demonstrated it & He was confirmed to be FS User too,
Zunisha, Gorosei & Shanks also demonstrated Telepathy, meaning they are FS Users (Shanks is Confirmed),
Luffy Unconsciously did it too & He is FS User,
Mihawk used Telepathy to show Luffy what He is seeing (Just Like Yasopp & Kata did in Film Red or Zunisha with Momo),
Which confirms He is indeed a Future Sight User
Mihawk might lack Voice of All Things or other Techniques that make you bond with others,
But when it comes to Haki Techniques used in Combat, He has it all.