Some of that is the result of a historical decision when refuges were first getting started was to "fund" them through claiming Housing Benefit.
This was partly because local councils would respond to a housing issue but would not to one that indicated the issue was male violence.
So the basic service of a safe place to stay is still based on that. Every additional service / support that a refuge wants to offer has to be funded through individual grant applications.
No Party as far as I know has considered a national policy of support.
But also many would not rely on the state having a user led approach to services. Dont forget that Eaves had its funding for supporting refugee and asylum women taken away and given to the Salvation Army who provides care along "Christian" lines.
And local councils have responded to women escaping domestic violence by placing them in hostels, many of which are mixed.
And Labour pushed for Housing Associations to take over refuges.
I think a nation wide reliable service would be great. But as we know state run institutions may have efficiences of scale but can act inappropriately - or even be captured by lobby groups who thinks biological women aren't an actual thing.