In the feature requests catagory you can find
Please read before requesting the addition of a package to the Manjaro repos:
Be aware: unless there’s an obvious need (or e.g. the package is unique) the answer will probably be “no”, and especially so if it’s already in the AUR.
Maintaining packages take a lot of time. Adding a package is not a one-off event and requires work by the package maintainer. Therefore, unless the package maintainer uses the software it’s very unlikely they will maintain a new package.