This is a reasonable opinion, but you could point this out to any youngster prior to making the step up. For example, what does Williams have in terms of technique that gives him an edge over Gomes when it comes to playing with less time and space in the mens game? What did Lingard have? Cleverley? None of them are on Gomes' level of technique.
Until he gets tested for a bit, it's impossible to know. What we do know is that his first touch is better than most footballers. We do know that he has close control that others would dream about. And we also know that he's small. It will depend on how his mind adapts to senior football, but we'll need more evidence to see if he can't do it. There will be an adjustment period just like there is an adjustment period for youth players first playing for the u18s. An adjustment period when making the step up to the u23s. And so on. Gomes didn't smash it right away for those age levels btw. It took him a couple of months before dominating those levels.
I like this video of Gomes as a 13 year old playing against the u17s (Rashford is #10). In this video you can see how despite his quality, he's new to the level of physical superiority of the other players he needs to deal with. He loses the ball when he wouldn't playing against those his age. However, like every young player it wouldn't make sense to conclude he won't eventually come to terms with it even if there is the possibility.
I think he's a different case from Chong whose technique is much more sporadic.