A crucial part of every IFS session is to ask the protector what age they think you are (often, at least in examples, it would say something like 5-12) and then you could reveal to it that actually you’re 30 (or whatever).
I wouldn’t put it as strongly as to say that it’s a crucial part of every IFS session. It can sometimes be a very useful question and approach, sure, but I’ve had/facilitated plenty of great sessions that didn’t use that question at all. And there are people who that question just doesn’t resonate with.
Sounds plausible to me. Alternatively, telling you that they didn’t over-apologize still communicates that they would have over-apologized in different circumstances, so it can be a covert way of still delivering that apology.