Hello!
Per Google’s strict policies, structured data must be presented on the page. TSF does not edit your content and probably never will. Therefore, TSF will likely never support FAQ Schema.org markup; because otherwise, it must break Google’s guidelines.
So, you may favor plugins like these to add FAQ entries and markup for you properly:
– https://wordpress.org/plugins/helpie-faq/
– https://wordpress.org/plugins/ultimate-addons-for-gutenberg/
– https://wordpress.org/plugins/ultimate-faqs/