Hardly.
What the iPhone shortage simply means is that people will defer their iPhone purchases from this quarter to the next. The net result will be that Apple reports less revenue this quarter, and makes up for it in the next.
Subscription prices are up because content costs more to make / license, and ads are there because Apple is in a unique position to facilitate a relationship between developers and customers while continuing to respect our privacy.
Ad revenue is also a drop in the bucket compared to iPhone revenue, so I have no idea how anyone could in their right mind imagine that Apple is planning to use one to offset the other, much less turn into an ad company. It's like saying that Apple is a dongle company because they sell adaptors for the headphone jack, never mind that the money from its sales would probably be a rounding error on their balance sheet.
A lot of accusations towards Apple don't really make sense when you actually stop and think about it for more than 2 seconds.