Chibnall would have not used the term "Shobogan" if he didn't mean to refer to the original one, intending "native Gallifreyan who isn't a Time Lord", that fits both for the original Tectun and the group of outsiders - that is, Gallifreyans that are not in the Citadel, are not Time Lords, are out of the Elite.
About everything else, I think each incarnation of the Doctor before-the-First known so far deserves even a tiny page (even each of the "Morbius" ones) and a tiny space in the incarnation template, under a specific section.