There's been a couple of articles like this:
https://www.blamefootball.com/2021/...-is-developing-into-a-paul-pogba-replacement/
All are quoting The Athletic as original source though (I don't have subscription):
https://theathletic.com/2811609/202...field-as-he-makes-effort-to-stay-disciplined/
But basically what it's saying, is that he has been developing physically and they think he could and should make the switch from AM to CM. However me being skeptic, I think it'll take some time and experience to adjust to that role. The deeper you play, the different skillset you need. Dribbling, shooting, one-twos become less important (but not unimportant ofc) when you play as #8 or #6. Reading the play, intercepting balls, tracking runners, long range passing ability...they become increasingly important. Pogba himself is struggling to play in a 2-man midfield at the top level, without making our midfield porous. I don't know about Mejbri.
Disclaimer: I haven't watched him much to have an opinion on the breadth of his skillset.