Not sure where you are getting your info from:
Since the late 1980s, in-flight refueling capabilities were built into all newly developed tactical aircraft, including the Su-24M, MiG-29, MiG-31, the Su-27 series, some MiG-25 models, and the heavy Tu-95MS, Tu-160, A-50, and Il-80 aircraft. New tankers were also developed, including fighter-tankers, as well as the new hope for Russian strategic aviation, a modified Il-78M.
MiG-29SMT was the first standard MiG-29 to get AAR, tested in 1995. SMT only entered Russian service with the rejected Algerian models.
http://toad-design.com/migalley/index.p ... -variants/
flight refuelling trials on standard MiG-29 test aircraft began 16 November 1995, completed January 1996
Su-27 didn't get AAR until the SMK (or SKM) variant and wasn't even tested until 1995.
https://www.milavia.net/aircraft/su-27/ ... riants.htm
One prototype converted by KnAAPO in 1995 from Su-27SK fitting the IFR probe.
Wasn't put into Russian service until the mid 2000s.
I already stated MiG-31 had it from the start, as did the Su-24M upgrade. No MiG-25 has AAR as far as I am aware. Not sure why you are referencing bombers and transport aircraft.