I used to work along scouts in the recruitment team of a major Premier League years ago, and their goalkeeping scouting was super detailed. They definitely didn’t pay attention to shots faced/saved like the general public looks at because all that told you was identifying the busiest keepers who more often than not played for the worse teans, but instead scouted the ‘quality’ of those saves. For example they had metrics on how many of those shots are held from distance, hold percentage under pressure, and on shots that are parried, those are graded by ‘where’ those shots are pushed out to based on threat level to a follow up being scored or even a corner conceded (i.e. Keepers who pushed the ball wider instead of in front of them were considered better). They had heat maps on starting positions for a range of situations and success scores on aerial duals and claims. These days you’ll also have deeper knowledge of ball playing abilities and styles too. The resources at the top of the game are genuinely insane when applied.