Just got off the phone with a really nice guy from VMware support. He pointed me to this blog post which is still valid for VCSA 7.0.
https://virtuallyvtrue.com/2020/01/03/how-to-change-the-startup-setting-of-services-in-vcenter-serve...
Yes, it's not in the UI but it will do the job.
Maybe helpful for some of you...
