maybe, but this isn't really a response to his question. he is talking about his actual weight changing not how he looks
The question was why he hasn't lost weight dispite doing more exercise. The answer is diet. More specifically, a lack of caloric deficiency.
Noob gains and recomping is possible but you are doing him a disservice by explaining away his lack of weight loss for this reason because you then are implying he should just keep doing what he is doing.
If he keeps doing what he is doing, he's going to plateau. The reason why most people quit the gym 12 weeks after new years resolution is they think they can train themselves thin which ends up in frustration.