I think the reason people are noticing he shows up for big matches is because in big matches team tend to leave more space behind, giving him more space to attack.
When we attack teams that park the bus we tend to struggle to score (obviously as that’s the point) and the fan mentality in these situations use to be “Well the striker has to bail us out like Aguero would” and Jesus isn’t that kind of player.
The shift to F9 has changed that mentality. Now Pep should just play Jesus as the 9 all the time even against a parked bus because the teams mentality has shifted for those situations.
1) If the opposition is parking the bus we now know the 9 can’t be the focal point, everybody has to pitch in, so Jesus has less pressure and can play.
2) Against the top teams their will be space for Jesus and he will score.