Guardiola never adapted his style since the day he stepped into the premier league. His style requires technical players in every position. Especially fullbacks.
His fullbacks are arguably his most important piece to the jigsaw. We saw it at Bayern. He has his fullbacks push up and play inward sharing the space with his DM. This helps them in transition, pressing, and retaining possession. This also gives more freedom to their wingers, as they operate in much more space when they hug the touchline.
His first season at City, he had Zabaleta and Kalorov playing there. It's no wonder it failed miserably, not to mention his players were getting caught on the break given they hadn't mastered their press yet. The board back him with upgrades, get signings done before August so they have a full preseason with Pep, and next thing you know they are dominating the league playing his style.