Manchester United needs to sign lots of players during this transfer period, and they are suppose to sell lots of players also, some players are not just suppose to be in Manchester United due to how they perform. Just as you said Manchester United are suppose to sign new strikers, if you check their performance you will see that they are always dominating in most matches, but they are always finding it difficult to convert most of the chances which they have into goals, and I will say Manchester United will still have to work on their defense and goalkeeper, they have a terrible goalkeeper.
Manchester United has a bad goalkeeper, and I hope Amorim does not rely on Onana next season. Both Onana and Bayindir let the club down last season by conceding unnecessary goals, that cost them a title even in the Europa League final. I was disappointed by their results last season, after spending a lot of money on players, they failed to finish in a good position and were unable to defend the Europa League league title despite their unbeaten record.
We saw the benefit of Chelsea investment in young players under Pochettino, as those players improved and won trophy. They have completed the Cunha deal, and the next target is Mbuemo. If they can get Mbuemo from Brentford, they should not stop there, they must look for another striker who can convert some opportunities into goals, unlike Hojlund, who we expected would improve during his second season.