I believe it. They’re primarily using missiles that take a predictable, ballistic arc, which makes them very easy for the Iron dome system to intercept. Furthermore, Iran’s responses so far have seemed very carefully measured so that only a few missiles get through the iron dome. Based on previous strikes, it seems like they could overwhelm Israel just through sheer numbers, yet they haven’t.
Here’s a decent article on this:
You’re being downvoted, as is tradition, but you’ve right.