Hi Ceci, I like the RS walking tours, as well. I'm assuming you have the RS Audio Europe app on your phone? I got so used to using the app for walking tours in Italy that I was surprised there are not as many for other countries. If you go to "Explore Europe" on the app or on this RS website, you can find what is available for Hungary. https://www.ricksteves.com/europe/hungary. Under "Listen" there are about 15 "talks". I see that just one of them is an actual walk, "Budapest River Walk". Unfortunately, that seems to be it.
It's been kind of fun to walk around various towns doing the walking tours with the RS guide in hand and run into others doing the same.
If you are looking for other resources, you can listen to the saved Monday night travel shows.
I hope you have a nice time in Hungary. I've only been to Budapest, but I really loved it.
EDITED TO ADD: I just found this. It is a list of all available walking tours. And the Budapest River Walk is not on the list, so I'm not sure what's with that. I did listen to the start of the walk, and it sure does sound like his other "walks"
https://www.ricksteves.com/watch-read-listen/audio/audio-tours