The last 18 months? That's since March 2024: we won the last 9 games in 23/24, April and May, to win 4 in a row and got beaten in November (at Bournemouth). In that period, the 4 in a row aside, we broke the record for most consecutive unbeaten games in Europe.
Also, the main reason why we didn't dominate possession yesterday was our passing and midfield problems. It wasn't tactics. The more this team develops, the more it will resemble previous Pep teams in terms of midfield dominance and possession-based style.