Everything you described sounds like typical (if you can call it that!) MLC.
My H has gone through long periods of silence. Silence, not only with me, but with our daughters. Currently, he doesn't even text or call them. He cancelled the last visitation with D11.
There's absolutely nothing unusual, in terms of MLC, in what you described. I know it seems like extreme change and it's easy to jump to some sort of conclusion. Don't. It's a waste of precious energy that you need right now for you and your daughter.
I know how hard this is. Probably, the hardest thing you will ever do.
Leave him to his journey. Respect his no contact by living your life and taking care of your daughter. Treat this as if he has died. If he comes back from the dead, it will be a wonderful return of the Prodigal Son. In the meantime, focus on YOU.
You can do this. I know it. You don't need to try to be strong, YOU ARE STRONG.
Lots of love,
Heather
"You know, it's times like these when I realize what a superhero I am." Tony Stark/Iron Man
“Focus on what you can do, then do it with all your heart.” Lois Wilson