They are built by Flathub, just like the vanilla Chromium build on Flathub. Here is the most recent build logs for x86_64 https://flathub.org/builds/#/builders

They are built by Flathub, just like the vanilla Chromium build on Flathub. Here is the most recent build logs for x86_64 https://flathub.org/builds/#/builders/12/builds/8123 https://flathub.org/builds/#/builders/12/builds/8123 which I found from the GitHub green-tick status icon on the latest commit on https://github.com/flathub/com.github.Eloston.UngoogledChromium https://github.com/flathub/com.github.Eloston.UngoogledChrom....