Uhh, The F-4E retired from ANG service in '91 (They even flew support and interdiction missions in Desert Storm) and in the later years mounted the AIM-9L / -9M & AIM-7F, as well as the AN/ASX-1 TISEO.
The F-4J/-4S remained in USN service until 1987, and the USMC’s trucked on until 1992, they were fitted with the AIM-9L / -9M and AIM-7F.
And the F-4G (Specialist Wild Weasel [SAM hunter] airframes, based off the F-4G) remained in reserve until '96.
There are more than enough variants yet to be implemented for that not to be an issue; for example the F-4B / (F-110A), F-4D, F-4E(late) and F-4G are right there waiting to be implemented allowing ordnance to be added, adjusted, expanded & refined to bring them into proper alignment as needed since what currently exists are pretty poor implementations all round with a mishmash of features from various blocks.
Further there are little things like the CL tank interlock that prevents firing a sparrow from the rear recessed bay if a Fuel tank or gunpod is mounted on that station, so it would need to be jettisoned first before they could be used, which of course wasn’t possible with gunpods as they were never mechanized for it, let alone which specific fuel tank (The 600 Gal tank we have in game can’t be jettisoned, the 370 can; if wired & armed to do so).
Also Early USAF F-4’s (C/D/E) would be restricted to the IR Falcon in place of Sidewinders so there is also that, though would have access to an IR Jammer(AN/AAQ-8).
They really aren’t, anywhere near their maximum potential, we’re still missing the Standoff ordnance (Walleye ERDL w/ AN/AWG-16 or GBU-15 / AGM-130 & AN/AXQ-14), IIR Mavericks, Shrike / StARM / HARMs, Targeting pods & SALH ordnance, and CBU’s. Things could get so, so much worse for tanks it’s surprising that they are complaining even though Aircraft are held back so very much, in comparison to IRL.