F-106 is a interceptor. The bombers it was meant to shoot down are not even implemented.
Kit is similar to other fighters actually.
While in game we have aircraft available with weaponry and equiment only specific variants of these aircraft carried in reality as well as the most simplistic designations aircraft can be pressed into roles they were not designed for.
Some fighters came to be strike fighters in reality and various interceptors became air superiority and/or CAS platforms.
Belgian Mirage 5BA, German Alpha Jets and Italian F-104 were stationed in Turkey during the Gulf War of which at least the Mirage 5 was flying CAP missions.
In Swiss service Hunter changed role from air superiority to close air support as well. While CAP would haven been at least a theoretical possibility at any time of course.
Milan incorporated avionics designed for or inspired by fighters, strike fighters and reconnaissance platforms and inspired technology designed for Super Étendard as well as export Mirage F.1 variants.
What would have come of it in service in later years remains speculation.
Looking at the opposition I do think Milan would be fine at 9.3.