Author here. Thanks for sharing this. It seems they released an updated version of this analysis last year [1]. It matches what I saw when analyzing the IPA. I tried to do a deeper analysis on the code itself using several tools, including Google's own bloaty [2] which was not very useful without symbols, classdumpios [3] which revealed something like 50k interfaces starting with "ComGoogle", and Ghidra [4], which I left running for a day to analyze the binary, but kept hanging and freezing so I gave up on it. Perhaps comparing the Android and iOS code could lead to something more fruitful.

[1] https://x.com/emergetools/status/1943060976464728250

[2] https://github.com/google/bloaty

[3] https://github.com/lechium/classdumpios

[4] https://github.com/NationalSecurityAgency/ghidra