As former BioWare executive producer and Anthem development lead Mark Darrah explained in a lengthy video about the game's troubled creation, Anthem had code for local server hosting in the later stages of development. Theoretically, this could have allowed the game to run without EA's infrastructure — and perhaps such code can still be recovered.
Initially, Anthem was created as a typical game-as-a-service with a "client-server" server architecture: all game logic was processed on the servers, and players' PCs only displayed the result. However, according to Darrah, up until a few months before release, the game had working local server code used by the developers.
Anthem had code for local servers until the very end of development. I don't know if it works now, but you can try to save it and restore it.
The developer also described an alternative future scenario for Anthem — reworking the game into a single-player project with AI-controlled companions and updating the visuals to modern standards. He estimated that such a project would require about $10 million in additional investment — an amount that EA, according to Darrah, "certainly won't spend" on a game that the publisher has long wanted to get rid of.