Mbappe – making his 150th Ligue 1 appearance – was a leading light for PSG at Parc des Princes, getting an assist for Julian Draxler and also finding the net via a massive deflection off Ludovic Ajorque in the first half.
He was a regular threat to the Strasbourg defence but will likely be frustrated not to have added more goals as he was denied by Matz Sels twice in the second period.
Despite consistently being the biggest danger in a PSG side that faded badly in the second half and saw its 3-0 lead cut to 3-2, Mbappe was targeted by certain sections of the crowd.
The France international is into the final year of his contract at the club, and although president Nasser Al-Khelaifi said Mbappe had no reason not to extend his deal after the signing of Lionel Messi, an agreement still eludes PSG as Real Madrid circle.
However, Pochettino is convinced Mbappe remains utterly focused.
"Kylian is focused on our goals. He did well and I am very happy with his performance. He must continue like this," Pochettino said.
"I didn't hear the whistles against Mbappe."
Earlier in the evening it was all cheers for the fans in Parc des Princes, which welcomed a capacity crowd for the first time since February 2020. Those in attendance got their first glimpse of Messi after his arrival from Barcelona.
👋🏻😀 #LionelMessi says "Bonjour" to the Parc des Princes faithful today ahead of @PSG_inside's #Ligue1 clash with @RCSA. See the match highlights here 👉🏻 https://t.co/Q2DUCXlpn8 | #PSGRCSA pic.twitter.com/hyy0DTJnOL— beIN SPORTS (@beINSPORTS_AUS) August 14, 2021
Messi and his fellow new signings – including former Real Madrid captain Sergio Ramos – were presented on the pitch before the game to a raucous ovation, though neither of those two actually played.
Pochettino wished he could have joined in the celebrations.
"It was a great day for the PSG family, there was an amazing atmosphere," Pochettino said.
"I was not present during the presentation of the signings, but the feedback we got was that it was incredible.
"All players need to feel this affection from the fans. I want to congratulate the whole club again. We experienced something moving. I would have preferred to be outside the changing rooms to experience this.
"It's always nice to see our supporters up close. Football is different with the public. A year and a half later, it feels good."