How can I make a screenshot of the complete document loaded with chromium (CEF4) with Delphi?

Question

I use TChromium (CEF4) with Delphi 10.3.3 and need to make a screenshot of the loaded page, not just the part visible.

With TWebBrowser, I could just resize the browser to the length of the document via iHtmlDocument2, but I need to do it using TChromium and cant find any function/property/documentation about it.

The TakeSnapshot function of chromium only create a snapshot of the visible area.