England doesn't have its own government and parliament, it's run directly by Westminster which also runs the UK. Part of the issue with the UK is that they never bothered to introduce a properly federal system, Westminster rules supreme gracing regions with some power to self-administer to lower their discontent but they can also take it away at any time.

Which then also led Britons to have inane takes such as the UK not being sovereign while being in the EU. They simply don't get (con)federations.

The issue with England in particular is that they don't seem to be discontent (enough) to demand Westminster devolve some powers, seeing that the country is governed by London for the benefit of London the rest being periphery. See all those English towns suddenly realising that all the money they got to develop were EU structural funds, not Westminster, and then still sticking with Brexit because I suppose realising your mistake is more embarrassing than tripling down. In their mind.

And Northern Ireland doesn't have its own government (usually) because they can't agree to form one because reasons.