What exactly they mean by "compendium" has not been super consistent over the years.
compendium is, generally speaking, all of the content you can read and is separate from the character builder
That is one way they have used that word in the past, yes. Sometimes they have also used it to refer solely to the pages for individual things (classes, spells, items, etc.) exclusive of the actual digital books.
That is covered by what I said, considering the individual pages for things are content you can read that is separate from the character builder. I never mentioned the books as a thing on their own because the books are part of the overall compendium.
In the Mecha Koboldzilla chapter, several of V3P0's Wares are listed as "Tooltip Not Found". I'm not sure what items they're supposed to be, as they only have prices and not names.
That is covered by what I said, considering the individual pages for things are content you can read that is separate from the character builder. I never mentioned the books as a thing on their own because the books are part of the overall compendium.
Error, my mistake
The species are adding additional ability score improvements as well as the backgrounds
In the Mecha Koboldzilla chapter, several of V3P0's Wares are listed as "Tooltip Not Found".
I'm not sure what items they're supposed to be, as they only have prices and not names.
https://www.dndbeyond.com/sources/dnd/hgtmh2/mecha-koboldzilla#V3P0
in the Veiled Lady chapter, the Fungal Heart Map 7.2 is missing the "Z" marker mentioned in the text.
https://www.dndbeyond.com/sources/dnd/hgtmh2/the-veiled-lady#Wave2TheHeart