Disabling Property Editor on Reader mode? (Part 2)

Hello, I’m revisiting an old problem I had because I’m now encountering the problem that was present even in the prior accepted answer that is: how to disable regular text properties on the reader mode.

I didn’t worry about that problem prior because I was not using the Property Editor to store regular text, just tags and date but now, I need to find a fix for it as my usecase has changed.

No matter what kind of CSS I do, it just does not get disabled.

I believe it has to do with the metadata-input-longtext class div having the additional property of contenteditable="true" which cannot be turned false using CSS.

What are my options here?