So which is it?
Is it standard practice for the forthcoming Endwalker complete edition to contain all expansions up to the current release (including the now-previous expansion Shadowbringers), or is it "weird" to bundle them together?
There's no difference between the two ideas besides a perspective of time. Past products are bundled with an unreleased product because that is what will be expected when it is released and becomes the current product.
Apparently the game can't grant you permission to access Shadowbringers-as-bundled-with-Endwalker until you actually own Endwalker, which isn't released yet.
