Yes, as someone else pointed out, when the East German doping program came into daylight for real, East Germany did no longer exist. Hard to ban a country that doesn't exist.
In OG Barcelona in 1992, when the Soviet Union had fell apart and the athletes competed under the Olympic flag as the Unified team, did they compete as a team in any discipline, f.i. did they have a soccer team? They sure competed as team in the Gymnastics event and were treated like Soviet Union, with a team of gymnasts where I believe only one of them was Russian (Grudneva). Bogu is Belrussian, Lysenko and Gutsu Ukrainian, Chuso and Galieva from Uzbekistan, but in retrospect it's said that "Russian won the team gold in Barcelona"? Or is it just me reading the wrong sources

(I know it's not the same situation, doping vs a country falling apart, but still it came to mind.)