Installing the modpack on a different 3erd party launcher - Hayerhi/orange-must-have-optimization-mods GitHub Wiki
first step of the install is to open your launcher (the showcase use MultiMC).
click "on new instance" and "modrinth", click on click browse
search "Orange must-have optimization mods" and choose the first modpack in the list
click OK
the instance will be created in the launcher
click "launch"
done!
check if your launcher support Modrinth modpacks here