How can I install manjaro in orange pi 4 lts?

[vcottineau]

For the installation steps you can use the manjaro-arm-installer. Some documentation is available here: manjaro-arm / applications / manjaro-arm-installer · GitLab

However, Orange PI 4 LTS in not currently supported:

Manjaro ARM on a Orange Pi 3 LTS or Orange Pi Zero 2

We are currently working on support for the Orange Pi 3 LTS and Orange Pi 4 LTS. Currently no plans for the Zero 2. Swapping out rootfs and/or kernel stuff from other distro’s to Manjaro is not something we will officially support. But you can always try it.