Using ':not' in CSS Selector for record_mask_text_selector Configuration

Are we able to use not in our CSS selector for configuring record_mask_text_selector? I'm looking to apply a class to a few elements that I'd like included in the screen recording (vs trying to block all the ones I don't). Here is my init config that doesn't appear to be working.

record_mask_text_selector: "*:not(.mp-allow-text)", 

and a simple element with the class applied.

<span class="hidden md:block lg:block xl:block mp-allow-text">Flow</span>