I hope Rio Ngumoha does not disappoint Liverpool because he was highly rated by the LFC scouts, and thus he made his way to the club. If Terry is so appreciative of the player, I'm sure he is special and has good qualities in him.
If he turns out to be a star in a few years, it won't be the first time that Chelsea fumbled with a young talent. Because as mentioned, in the past Jamal Musiala was their player and later went on to play for Bayern Munich. On the other hand, Declan Rice was also a part of Chelsea's academy, but he wasn't rated by them.
Chelsea do not take care of their own players and are seen buying a lot of other players. Their business needs to see better days.
Regards
Duke