The 24-year-old made the move to Anfield from PSG for a reported £123 million, including add-ons, in the latter stages of the transfer window.
Barcola made his debut in the win against Ipswich, coming off the bench for the final 26 minutes as Liverpool earned their first win of the season.
Speaking to Sky Sports after the game, Iraola was impressed with Barcola’s contribution, but admitted it may take time for him to adapt.
"I think he had good minutes. I think he has a very good pass,” he said.
"In a counter, a couple of times we didn't find him, so we will have to learn these kinds of movements because he will be in behind, threatening all the time.
"He hasn't played any competitive minutes since the World Cup, so we have to be a little bit more careful, but I think he has been very good."