So by looking at this it is quite understandable that they cannot do some things outside their authority to completely overhaul the players because in the end this could interfere with their own electability and cause other problems that make them have problems with the rules given by the federation in the EPL in the end.
I heard about the same thing, but does this limit their ability to get loan players? They can hire free agents or something if they can't buy players. Sure they might not make United compete for the top 4 after a month in training but at least you'll have options. Especially after you let some players go through this window. At least this is the sentiment I saw in social media from some United fans. I guess you could argue they'll use the academy to provide backup but that's also risky. To be fair there's no instant fix for massive debt after a change of ownership. CMIIW.
It can still be done but still Manchester United must release some players first before doing so because after all, for now their conditions are still very limited so even if there is a player loan option, they still have to release some players first, especially for those who are not used at this time.
The Ten Hag era and the management in that era not only left problems in terms of performance but they also left problems for several things including regulations and restrictions on Manchester United in terms of player transfers so inevitably when they want changes with the overhaul as much as possible they have to remove unused players first and after that they can make purchases or loans according to the criteria that Amorim expects.
The academy players could be a viable solution but in this case I would prefer Amorim to release some of the unused players including the older players who are currently only filling the capacity of their squad.