I believe Tachiyomi was meant to download the manga and view it on Android?
Correct
I forgot what Komga was, is it a downloader?
Similar to something like plex, jellyfin, kavita, etc. Its basically a manga media server. Not a Downloader
For downloading, I ended up trying out "kaizoku," which is unfortunately no longer maintained. Acts as a frontend for a service called "mangal," which seems to no longer be maintained as well... Does the job for some websites at least.