I can’t find the link now but iirc, the last time I saw a sales statistics/shipment, breakdown was 57% iPad, 19% Air and 17% Pro (combined 11 & 12.9). This was before mini 6 release. Might be before Air 4 & M1 Pro, too.
In any case, I expect profit margins for Apple are higher on the iPad Pros.
With emphasis my statement and question is about worldwide annual shipments. Not just your city/country but among the 195+ countries.
~80% of the iPads will be the cheap-end as that is most affordable.
The Pro models would make up the least shipped product line as it is that expensive.