I mean all 236 of his senior appearances have been at RB so not sure of the merit in this idea he suddenly doesn't know or has forgotten how to play that position, or doesn't understand the requirements of it.
Putting him in midfield isn't the answer, short-term or longer-term. Short-term, because we don't actually have any senior/experienced RBs, just a collection of players who can play there with varying levels of success. Long-term, we seem to be overlooking the fact that he was for a period of time arguably the best RB in the world, and that's not easy to replace.
Part of it us undoubtedly Trent being hung out to dry by the set-up and part of it is just poor individual form, but I'm not sure the current version of Trent is any more useful to us in midfield. You'd probably get better passing but I'm not sure we'd necessarily be much more solid - if Trent applied the same level of defensive effort in midfield as he has been in defence we'd still be easily targeted down that side, even if someone like Gomez was actually physically occupying a RB position. Doesn't solve our lack of pace/aggression in the middle, doesn't solve our tendency to lose second balls, doesn't solve our poor pressing, doesn't solve the issue that it's just far to easy to bypass our midfield and get a run at our defence (which is forcing them into poor decisions and mistakes that cost goals).
We'd be better served by telling him to adopt a more conventional RB role and see if he can play himself back into form.