Pep Guardiola is an amazing manager. Their success in this regard is already enough to tell us this. The fact that they won the triple trophy with Manchester City last year proved this once again. They left one of the biggest tournaments in Europe and one of the biggest in the world as champions. He will probably continue to coach at Manchester City unless he wants to leave Manchester City anymore.
For the time being there have been no stories or rumors in terms of leaving Manchester City for Pep Guardiola because next season Pep Guardiola will still train Manchester City and that is very good for Manchester City. Especially if next season Manchester City will remain strong to fight for another title in every league, because last season Manchester City had just won its first title in the Champions League so it will definitely try to get it again next season.
I didn't hope Pep Guardiola to decide to leave Manchester City so soon after he managed to win the team's first Champions League title. Manchester City will try to defend him in every way possible, including continuing to support him in getting coveted players, so Pep will be happy to stay. Financial strength will help Manchester City retain one of the best coaches in history, so they will have more chances to win multiple titles each season under Pep Guardiola.
I would probably really hope that Pep Guardiola will be in charge of Manchester City forever and make himself the longest-serving coach for the team. He deserves to retire in the best competition and with the best team like Manchester City, but it's always possible to get him gone when one thing or another goes.