You don't even need to patch the Android app called Red Reader. It works by default. Not super pleasing to look at, but it has always done the job. I think they managed to squeak by the API shutdown thing because they are headed toward blind users, but sighted users can use it too.
Yeah Red Reader got a special exemption as an accessibility oriented app. I use it for whenever I need to check Reddit for something (typically football/soccer news). It's ugly as sin which is good because it makes me less inclined to stick around as long.
I deleted my Reddit account after a decade a couple of months ago but I used Boost the whole time I was on the site, even after they supposedly put the kibosh on third party apps. The only issue was that if I wanted to post anything that had an attachment I had to use the official Reddit app or website.