I think that is part of of the frustrations, or perhaps obstacle, to some fans getting into the High Republic?; the sheer amount of content out there.

A quick look here for anybody unfamiliar with the project: https://starwars.fandom.com/wiki/Star_Wars:_The_High_Republic

That is a LOT of content listed, almost overwhelming to anyone looking to get into it. Other than the what is going to be the 7 main novels, how would anybody identify what they may want o read, or need to read, to get the full enjoyment for stories and the characters?

The content listed above in the Wiki is only at Phase II, which they are around half way through? There’ll be a much more to come in Phase III as they warp up the project!