One can argue N3 has been "delayed" as it will enter HVM a few months later than N5 did, but they've always said H2 2022 as noted. There has been no change since TSMC stated that timeframe about a year ago. It has been further nailed down (in rumors, not TSMC announcements AFAIK) to July 2022 which barely even puts it in H2.
I think that seekingalpha author had an axe to grind, or was looking for clicks with a misleading headline. "Hey look, Intel isn't the only one with process delays" kind of bull.
That said, TSMC's statements are pretty confusing where they say smartphones will play the biggest role for N3's first year. Without Apple that would be almost impossible - even if Qualcomm goes 100% TSMC instead of Samsung they their schedule has always had next gen SoCs shipping January/February. They sell a fraction of high end SoCs versus Apple's volume, so they'd have to be making mid range SoCs on N3 as well. I suppose if the iPhone is not on N3 that could open up enough volume for Qualcomm to use N3 for their midrange SoCs, but I'm skeptical.
So you can read whatever you want into TSMC's statements, and make a case for almost any outcome. I expect more back and forth on the rumors until (and maybe even after, since it isn't like iFixit's teardown will be able to tell...someone will need to get out the electron microscope) the iPhone 14 launches.
Obviously TSMC could clear it up if they wanted, but they've worked with Apple long enough to know their love for secrecy by default. So he's mastered the art of answering a question without providing an answer. He'd make a great politician!