I have the same problem. I’ve noticed that google is able to find the feed when i enter my url https://www.airbuilt.net or the full feed https://www.airbuilt.net/?feed=rss2?. Yahoo, on the other hand, still points towards my old mt feeds and isn’t able to get the feed no matter what url i give it.
Is there a way to make my current wp rss setup a little more newsreader friendly?