If you use Lemmy Connect, there's a block keyword feature that could hide some posts from specific news outlets, provided the poster included the outlet's name in the title; but not everyone does this. But yeah, we'll have to wait until it's added to Lemmy proper or one of the apps add the feature. Sync for Lemmy should be coming out soon(maybe by the end of the month?) and I think it'll have this feature as it was a part of their Reddit app.