Customs tabs created on Metafield not showing on the page

Kind of have a similar problem as this one, and there’s no answer for it.

Want to use the Metafield for tab creation like FAQ, but only the title FAQ shows up, and below is blank.

It seems it’s pretty quick to fix, but I just can’t find the right way, even though I copy the valid one that shows on another product page.

Any help would be greatly appreciated.