OK, so now you are saying your building is not covered by insurance and therefore not subject to the six-month limit.
That’s fine (if it is, in fact the case) but if your strata manager is urging you to make your claim as soon as possible, I would be guided by them. Why would you wait to lodge a claim when you know what the problems are? The longer you wait, the more likely the developer is to a) say it’s wear and tear and b) conveniently go bust.