Integrate Office 365 apps with on premise SharePoint server

[dangermaus]

I have installed SharePoint 2019 in my on premise environment and I want to integrate some apps from Office 365. I don't want to synchronize users or integrate AD. Is it possible just to integrate office 365 apps such as Forms and Planner with my on premise sharepoint server?

[#2]

No, it's no. The way to integrate Office 365 stuff in SP OnPremises is by means of an hybrid deployment so you need to integrate your local AD with Azure AD