So don’t you think that the MacBook Air has used M2 for cost? Considering it is their cheapest MacBook in the line up (other than M1 which is essentially going to get phased out).
Also if M3 isn’t ready, wouldn’t it have made far more sense for Apple to skip M2 in the Air line up and launch it with M3 in October (as it is essentially their best selling Mac).
The fact that Apple has refreshed the MBA with M2 now, mere months before M3 launches in October is very telling of their plans.
Looking back at the iPad line up, the air is still rocking M1 that is due to be refreshed to M2 literally right now, but there is no iPads coming for the remainder of the year, and I highly doubt they will throw M3 in it come Spring alongside the iPad Pro’s… what will happen is it will get M2 in late 2023 or early 2024 and shortly after we will see M3 come to the iPad Pro’s.
I think the road map for the MacBook line up will be…
Late 2023 - MacBook Pro (Touch Bar) will get M3
Early-Mid 2024 - MacBook Pro (High End) will get M3 Pro/Max
***We could see another price drop of the MacBook Air and M1 MBA will be phased out giving the M2 Airs the $999 starting price or they may just have a MacBook starting price of $1099 and be happy with it***
Late 2024 - MacBook Air will refresh with M3
Early 2025 - MacBook Pro Touch Bar will get M4
Late 2025 - MacBook Pro (High End) will get M4 Pro/Max
Early 2026 - MacBook Air will refresh with M4
And so on and so forth…
You've made a lot of assumptions, such as believing M3 is coming in October. I'd suggest reviewing TSMC public statements along with predictions from Kuo and Gurman about M3 products including iMac.