I have converted a C2 project to C3. Now, when I try to add iframe plugin into the same project, I don't see the plugin. Not only this but few other C3 features are missing like DrawingCanvas, Speech Synthesis, Game Recording, Typing Behavior in Text, etc. However, I can see all these features on a fresh/new project (created in C3).
I'm not sure what would be the issue. I need some of these C3 features and that is the main reason I have converted the project to C3.
This is a screenshot of a fresh/new project (created in C3). You can see the iframe plugin here.
This is a screenshot of the project converted to C3 from C2.
Thanks in advance.