54 of his total strikes were in the 5th round and only 1 (a body kick) was considered a sig strike. The majority of those 5th round strikes were to Leon's thighs...
Totality of strikes is assessed lower than damage/impact. Leon outstruck him, landed big enough shots that Colby spent the whole time running and in his best round, barely won because he landed no significant offence.
Leon stood in front of him all fight, landed much bigger shots, threatened with submissions and a takedown for fun, whilst his opponent ran for 4.25 rounds. That decision was more dominant than most of Jon Jones 48-47s over his career.