They created more than that. In the first leg, they had many near chances that didn't lead to shots, and that does not feature in expected goals. I think they were toothless to some extent because of Lautaro and Dzeko's form on that night (that was his 4th consecutive start in 10 days, against Roma, Napoli, Milan and Liverpool). And of course, they didn't have Barella. That's the main hindrance. Barella is their main creator. Both assists and pre-assists.
I don't think Inter is top 5 in Europe. They are probably the best team in Italy right now but in Europe there is an obvious top 4/6 that is clearly better than them. The top 4/6 is (Bayern, City, Liverpool, Paris + Real & Chelsea). So they are not at that level. But the way they played out of the back consistently in 2 games is impressive. Milan scored more at Anfield (lost 3-2) but they were nowhere near as good at playing through Liverpool's press. That's what I was talking about.
Comparison to Brighton is always going to be misleading. Salah, Mané and Thiago can't possibly produce the same consistent press and maintain a high concentration in a random PL game against a midtable/bottom half team as they do against the big 6 or at a KO stage in the CL... But that being said, Brighton is their next opponent (with a week to prepare), and it is the final run of the title race now so they'll have to give it their all... Bear in mind Pool won't have the 5 substitutions that they needed in Milano to change the game.