If you’re planning a DIY multi-zone mini split, both Zone Air and MRCOOL offer...
https://nova-wiki.win/index.php/DIY_Mini_Split_Install_Steps_Checklist_for_Multi_Zone_(Plan,_Mount,_Route,_Connect_Power)
If you’re planning a DIY multi-zone mini split, both Zone Air and MRCOOL offer solid options, but a couple of details might help decide