I still like him. And I still think he'll come good. I will go further than that and say he already has come good.
To put it another way, imagine it had been your first game today; never been to a match before. You're in the pub after. And your mate (say, who had bought you your ticket) told you the right-back is basically a kid who was in the Reserves a year or so ago. You'd probably say, "OK, not everything was perfect. But he got stuck in. Didn't hide. And it's not like he got absolutely roasted time and again down his flank and continually gave the all away. Could have been worse (say, Ged Taggart against Blackburn million of years ago - and anyway, he learned from it and went on to have a good career)."
"But, the big lad up front (who cost God knows how much and is, apparently 'World Class') looked absolutely out of his depth - is he from the Reserves, too?"
If the young lad (Mubama?) on the bench had come on and ponced about like Haaland had all afternoon, you'd be saying he was way out of his depth.
Rico will come good.