So it just occurred to me that CW season 7 could technically qualify as both Legends and Canon at the same time. Granted the canonicity of CW pre-Disney was kind of weird and inconsistent, but it is the only non-live-action material to be canonized after Disney bought SW, and season 7 is based on unfinished episodes from the pre-Disney days, so shouldn’t the new season technically be part of both continuities? Not that this really matters overall, but I find these kinds of things fascinating.
The series was created by George Lucas himself. It’s always been considered G-Level canon, even after he left following the third season.