[MOBILE] CMS Rich Content in Collapsible Text Box - Cannot adjust font-size in mobile view

Question:
In Mobile view, how can you adjust the font-size of rich content from a CMS collection dataset in a collapsible text box?

Product:
Wix Editor > CMS Rich Content in Collapsible Text Box > Mobile View

What are you trying to achieve:
I would like to decrease the size of rich content that is pulled from a CMS collection dataset field in the mobile version view.

What have you already tried:

  1. When the rich content was NOT in a collapsible text box, it was possible in mobile view to adjust the font-size of the rich content from the CMS collection dataset by using the A+ A- buttons. But this option disappeared when I changed to ‘collapsible text boxes (read more)’.
  2. I have tried using js in DEV MODE to adjust the rich content in the collapsible text boxes, to no avail.

Additional information:
Using regular text boxes (not collapsible text boxes), it was possible in mobile view to adjust the font-size of the rich content from the CMS collection dataset by using the A+ A- buttons. But this option disappeared when I changed to ‘collapsible text boxes (read more)’.

Any assistance would be much appreciated, thank you.