The principality club pipped Paris Saint-Germain to the Ligue 1 title last season while also making the Champions League semi-finals, all with Mbappe leading the line with 31 goals in all competitions.
However, the 18-year-old made a €180million switch to PSG at the end of the campaign, initially on loan terms before the deal becomes permanent next term, as Monaco also saw star players Bernardo Silva, Benjamin Mendy and Tiemoue Bakayoko all depart.
As such, the French giants have suffered a dip in form and currently trail PSG in the domestic standings while Tuesday's 2-1 UEFA Champions League loss against Besiktas left them bottom of Group G with just one point from three matches.
"I think we should give them time," said Mbappe, who scored the opener during PSG’s 4-0 hammering of Anderlecht on Wednesday.
"You know, when you lose a lot of first-team players, you need time and I think we are too demanding with this team. Some young players came, they need time.
"You saw the players, they are good players, so I'm not worried for them.
"But it's true, it's a pity they started this Champions League like that but it's not finished yet for them, if they win their three games, they can qualify so I hope for them and French football they will make it and they have to know we are supporting them."