I wasn't talking about when the Chaff was invented. It was used in WW2 but it still wasn't installed on early jet fighter planes.
For example, production MiG-23 received chaff/flare dispensers starting from MiG-23MLD version
(wikipedia) and earlier ML/MLA variants were upgraded to MLD standard...
So it is clear that fighter aircraft received their dispensers much later. Of course, every operational MiG-21 that is flying today (Indian Bison, Romanian Lancer) has both flares and chaff.
The same is correct about western aircraft, as for example British Sea Harriers hadn't built-in chaff dispensers during 1982 Falklands war and their received quick and dirty upgrades by putting the chaff in airbrakes ...
So the information I'm looking is when the fighter/attacker jet aircraft started receiving "personal" chaff/flare dispensers as upgrades and as serial production equipment.