CI/CD-style automation solution for NiFi flow deployments with reliable support

Urgent Help Needed
I use open-source NiFi and currently handle deployments and upgrades manually. With multiple environments, this process is becoming time-consuming and inefficient.

Current Setup:

400 CPUs
60 Nodes
200 Users

Requirements:

Automated (CI/CD) NiFi & Data Flow Management
Scheduled Deployments with History & Rollback
24x7 Reliable Support Partner Despite extensive research, I have not found a single tool that meets all these needs. Any recommendations?