LazySageDao
you can do this: mc can only get all the knowledge of the universe in which he is located (with an equivalent exchange), and the source wall prevents knowledge from leaking to other worlds. that is, being in the Pottereriana, he can receive all the knowledge only of the Potter universe. and knowledge about the coordinates of other worlds is stored in a common database of Akash. and only after the mc becomes a multiverse level, it will be possible to gain knowledge of other worlds without going to them
Thank you for the chapter. Each universe could have a root of the Akashic Record that contains all the information of that universe and as long as he can offer something of equivalent value he could get any knowledge, but unless he doesn't reach a high enough level, like 11, he can only get basic information of other universes like their specific location, energy systems or specific rules of these so he would need to keep exploring. If the multiverse were compared to a forest, the universes to trees, and their different dimensions and timelines to the branches of these, the universe of Primordial Earth would be the main tree of the forest and the source of the Akashic Record from which its roots extend and from these grow the other universes, which in turn extend their roots and so on, interconnecting them all in a great network.
Maybe the Akashic Records can be like a library having general knowledge like maps of the void for example and knowledge about the region or universe in this case. Maybe after he gains access he obtains a key or mark in his soul that allows him to access the Akashic Records in other universes. You could even look at it like the Akashic Records is tier 11 or higher being using his\her clones to gather knowledge. Thanks for the chapter!