As i found out by now, the answer is quite simple but very hidden. As mentioned in this Post: https://community.tp-link.com/en/business/forum/topic/274124 This works! Thanks

Hi, i have Omada software controller 4.4.4 on Ubuntu running with 5x EAP225 Wall. Now i added a TL-SG3428MP Switch, which is running fine. But how do i define a static IP for the switch in Omada...