What I mean with I don’t understand
Midori 11.x != Midori 9.x
It is fork of firefox and while using the Midori name it is not Midori but a rebranded firefox.
It has been seen before that someone takes over a well known - in the lack of a better phrase brand - and try to take that brand’s place.
To answer the topic question - there is no steps you can take to get the app Manjaro repo.
- this has been mentioned - the app in question is in AUR - so no need to be in Manjaro repo
 - It requires a Manjaro team member to maintain the package
 
About the Feature Request category
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.
General points “for” inclusion might include:
- Serves unique function/use-case
 - Adds a definite benefit to a wide range of users
 - Actively maintained but infrequent updates
 - I use it
 General points “against” inclusion might include:
- Another alternative already available in the repos (e.g. browsers, media players)
 - Niche (e.g. scientific software)
 - Proprietary or restrictive license
 - Old, outdated, unmaintained, AUR package
 - High-frequency/daily updates (e.g. -git packages)
 - Unreleased/pre-release software