HST Rewriting rich text field runtime for pagemodel api

For FTL/JSP websites their is the possibility to rewrite rich text fields runtime, see: https://documentation.bloomreach.com/14/library/concepts/rewriting-rich-text-field-runtime/hst-2-rewriting-rich-text-field-runtime.html

Developers expect this functionality to work for the SPA / Pagemodel as well. This isn’t the case because there are different content rewriters for the different pagemodel api versions and those are not extendable. 

If this feature will not become available an update of the documentation needs to be made that makes it clear that this functionality only is available for FTL/JSP websites.

But preferably make the pagemodel content rewriter extendable.