PBS is probably the best analogy you’ve got in America. The UK’s BBC or Canada’s CBC are better analogies, because they’re a full-service media organisation, with TV programming including news, children’s content (you might be familiar with the globally-popular show Bluey, which they produce), dramas, etc., as well as radio including news, sports, and music, a website with news reporting, and more. Like the BBC, the ABC has no advertising, though unlike the BBC it gets its funding directly from normal taxation instead of from a weird fee required to watch any television (even online streamed TV from other countries)—with bizarrely mafia-esque enforcement.