The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Integrate manager for Hetzner Dedicated
Resell VPS & Cloud Dedicated Products from Liquid Web
AI-Powered Integration of Data Protection and Cybersecurity.
Automate the sale of VPS servers & give your clients the ability to completely manage their VPS server inside of WHMCS, using the industry leading SolusVM control panel.
Teamspeak / TeaSpeak server provisioning addon