Yes, you can safely remove the field_faq_metatags field.
If you ever need to override schema:
    •    Add back a plain text field later.
    •    Give it clear placeholder text like your example above.
    •    Optionally, add a bit of JSON validation.
 

Question
What is an FAQ Test Page
Answer

This is an FAQ Test Page

Question
Does daisy Like FAQ's?
Answer

Daisy Loves FAQs

Question
Does Iryna Love FAQ's
Answer

Iryna loves FAQ's so much she spends all week writing them

Question
How does Echo feel about FAQ's
Answer

Echo is the mastermind behind this particular approach to page FAQ schemas.

Question
Do all prisons have gyms?
Answer

Most medium- and low-security prisons have some form of gym or recreation area. High-security prisons may have more restricted access to gyms in prison facilities.