Since the prime motivation of Putin to invade Ukraine was to shut down their impending natural gas exploration so that Ukraine natural gas wouldn’t compete with Russian natural gas in European markets, I would expect that Iranian oil will not extinguish the fire in Ukraine, but add fuel to the fire.
Putin does not like competition.
Plenty of frackable oil and gas in Europe outside Ukraine:
https://seekingalpha.com/article/4036239-european-shale-this-is-one-shale-revolution-wont-happen
scroll down for map.