I mean Dorgu was playing RW this season mate.
With Dalot, Dorgu, Amad, Garnacho we have 4 very good wingback options imo, players that can play on both sides aswell as some attacking options.
The first few games I noticed Amad was defending better than say Garnacho but I don't think the difference is that different now to give Garnacho to try that position.
AJ analysis on YouTube made a video about why Mazroui struggles at RWB because he is receiving the ball on his right foot which forces him to cut inwards rather than someone who is more left footed able to take players on both the outside and inside of the pitch.
This is something Amorim has talked about though, how he wants Garnacho to learn how to take players on both the inside and the outside of the pitch so maybe it's just a development tactic until we get an LAM that's more suited to his tactics & then we might see Garnacho at LWB.
Dorgu - Ugarte - Bruno - Garnacho
Would give us two inverted wingback.