

Both cbr and cbz are just compressed archives - R for Rar and Z for Zip. The format has got nothing to do with how the images are displayed in a reader application.
If you want any reader to read a comic frame by frame instead of page by page, you’d have to uncompress the file, then cut out each individual frame and give them sensible names (eg. page_39_frame_03.png or somesuch) and then recompress.
Someone else in the thread mention software that can do this, but it might not always work as expected, when the layout is not straight-forward.
Add it to my “backlog” folder that I have a program that picks from whenever there’s under 4 hours of playtime of my playlist. Once I’m through the old episodes I move it to the regular folder of podcasts that I subscribe to. I abuse Pocket Casts’ internal webapp API for this.
(If it is current affairs, I’ll subscribe while working on the backlog, so I both listen to the old episodes in order and get new episodes in the playlist).
Easy to manage like this :-)
Got approx. 7.500 hours in my backlog :-(