Here's another great article about The Union, going into further detail on the flawed settlements around devolution: https://blogs.lse.ac.uk/brexit/2021/04/23/the-uks-union-has-been-fractured-by-brexit/
"Two features stand out: the failure to change constitutional understandings and practices at the centre; and the continued position of England as the dominant partner, but constitutionally unrecognized as such.
...
English constitutional assumptions continue to govern the Union while much of the UK government continues as if there were still a unitary state with devolution tacked on."