Pixel 9, GrapheneOS, Obtainium 1.4.3

Cheogram was working until v.2.19.0-3+free, then it started failing.
https://git.sr.ht/~singpolyma/cheogram-android/refs

I see .apk's buried under the builds page:
https://builds.sr.ht/~singpolyma/cheogram-android

So, for example, see the most recent:
https://builds.sr.ht/~singpolyma/job/1748795

I'm not sure if they were somewhere else before that. Is there any way to make these accessible via obtainium?

Edit: Here's another issue. When I go to this link on my laptop, I see a .apk, and two .aab's:
https://builds.sr.ht/~singpolyma/job/1748795

When I go there on my phone, I see a .scm and a .nar.lz. The latter is apparently a compressed Nix install package.