On the Newcastle United side, of course they can be lucky because they have a goalkeeper who performs at his best because otherwise Newcastle United could have conceded a lot of goals in this match. The final result was that both teams collected 1 point in this first leg.
A good away point
They haven't played in the Champions League for 20 years, against a big Italian team in the first game, and got 1 point.
A well fought point in Italy.
And I agree with you, Newcastle is Very, very lucky.
Their performance was much better against Brentford.
The central midfield is not working and is starved of possession.
Bad performance on the biggest stage but very lucky

Poor Performance, not even a shot on target for Newcastle
Absent from the Champions League for 20 Years means nothing when you can not attack and get a shot on goal. This season should either lead to the sack of Eddie Howe or backing they still do not look like a side to qualify.
They have just improved on the way they defend. One point is not enough but good they had it.
Lazio Goalkeeper scoring yesterday was the highlight of the day.
Eddie Howe was very instrumental in making Newcastle what it is today. Indeed, the start of this season was not very impressive for Newcastle, but they also have to be realistic that in the UCL it is very difficult to compete and they are facing tough opponents.
I don't think that solving Newcastle's current problems is by sacking Eddie Howe, in fact that would be a worse thing.
The series results they achieved were quite good, even though if we look at the performance of the Newcastle team it was very bad, but they still have time and opportunity to improve.