The issue on flutter which you have listed in the description regarding selectable html:
flutter/flutter#38474

Seems to be solved/completed.

I like to be able to select text from html which has customRenders. (only the text selection is enough, ignoring custom widgets)

In normal Html() customRenders takes Map<bool Function(RenderContext), CustomRender> of which I have used CustomRender.widget() function.

The SelectableHtml() takes Map<bool Function(RenderContext), SelectableCustomRender> limiting me from using my custom widgets. SelectableCustomRender doesn't have a widget() function.

How can I have a selectable html on text only while keeping my custom widgets?