Under Ole, he played a total of 5 minutes in the FA Cup and 17 minutes in the League Cup.
Elanga was very much a Rangnick favourite rather than a Solksjaer one.
While I agree about Rangnick being the one to make integral to the first team, I am sure you are wrong about Solskjær. Your minutes are wrong, plainly. But Solskjær gave him his PL debut, two PL starts actually, at a point where many would prefer to see others prioritized more. He played him in preseason as well, and spoke very highly of his future at United. That he played him 17 minutes during the trainwreck of August-Octobre 2021, was not so strange considering the apparent necessity of getting Sancho, Ronaldo, Rashford (back from injury) going, while Greenwood, Martial and Lingard were all ahead in the pecking order at that point, and the attempt at playing Pogba in a LF playmaker role to get more out of him and Bruno together was also a priority (which looked rather promising when the season opener contained a Bruno hat trick and Pogba assist quadruple, without neither Rashford, Sancho nor Martial starting the game even). When things went to shit, it’s very understandable that itwasn’t seen as the time, atmosphere and place to blood a fresh 19 year old ahead of that competition.
Rangnick clearly felt that several of the attacking players were the problem rather than the solution, as they collided with his MO. He was half right, half wrong about the reasons for that, has Ten Hag showed us last season. But it’s easy to understand why he would fast track a player with Elangas attitude, physicality and discipline in that situation.
Elanga seems like a terrific guy, who deserves more playing time than he’s likely to get at United. Hope an Everton move will work out for him.