You know what this seems to have been only an issue with Brave-beta. Everything else is just working without my manifests. Also, I may have been using the non-beta extension in Chromium at first, which doesn't work with the native app, so I may have mistakenly believed it wasn't working too.
It appears that the 1Password app creates the manifests in the browser config directories it finds on startup. I didn't have Brave installed, but had a config directory lying around from a previous install, and it had the manifest created in the users config directory.
Pinned Comments
1Password commented on 2021-07-27 21:07 (UTC) (edited on 2021-09-13 17:52 (UTC) by 1Password)
1Password for Arch Linux - Stable
The source is signed with the GPG key
3FEF9748469ADBE15DA7CA80AC2D62742012EA22
and can be seen on the install-linux guide.Getting Started
Our getting started guide can be found at https://support.1password.com/install-linux/#arch-linux
Support
Our Linux support discussion is available at https://1password.community/categories/linux
Beta Releases
Our beta releases can be found at 1password-beta. Beta releases are more likely to have regressions than our stable releases.