How to Iterate Through Nested Tables in InDesign Using C++

There is no direct way to iterate nested tables. You need to write your own business logic for the same.

- Rahul Rastogi

IID_ITABLEMODELLIST on kTextStoryBoss sounds promising to find all tables of the story (should be by far fewer than walking all cells) .

For more details about nested tables I'd have a deeper look at ITextStoryThreadDictHier (the header comment even mentions the case) and walk around from there.

Can't tell you how to do this in C++ - but through scripting - you need to check every single Cell for Tables.