Real is not really a good example you know, they was extremely 'lucky' for the entirety of their CL run. Liverpool, MC, Chelsea and PSG could all put them to rest but ultimately failed to. Maybe it's luck or maybe its Courtois, but either way it's unfair to call out Lautaro when other world class attackers also failed to do the same job.
We also should not discuss the extreme possibilities in these cases as we can't control our luck. 1-2 chances simply wouldn't cut it. One of the best finishers in the last decade, Mauro Icardi, only had the conversion rate around 35%. Many world class strikers are only around 20%. 2 chances would average less than a goal even for the best strikers out there, it's unreasonable to hold Lautaro accountable when you create so little.