How to get a missing font to show?

I am having this EXACT same problem suet55213305. I use a third party extension to convert Quark to INDD. Most fonts came up fine but I have a few that I had to load and activate in Suitcase. It's there but when I go into INDD the copy is in pink and I can't replace it because the font that's supposed to be activated is in brackets and won't let me select it. Meaning it's missing except it's not. I'm super frustrated because I don't know how to fix this and it seems to be an on-going problem for many.

The brackets means that you don't have the font installed (although you say you do). Is the text also pink (in Normal view, not Preview?)

It sounds like the issue is getting InDesign to recognize the font.

Do other programs see it? Microsoft Office? Photoshop? Illustrator? Quark?

What operating system?

Under the Type menu choose the option "Find Font"

You will see the Find Font dialog window. Click on the font you want to replace in the upper window (Font Information) and then click on the inverted carat next to the Font Family field and scroll through the pull-down menu until you find the font you want to replace it with. Since you said that you've loaded the replacement OTF font it should show up in this list. Once you've chosen it make sure that the weight you want is also chosen and either click on Change All or click on Find First and change each instance one at a time. After making your changes click on Done. You should now have changed all instances of the font throughout your document. If you were unable to find the OTF in your list check other applications to see if the font is actually open. If the font is visible in other applications but not InDesign please post that information. Prior to doing that try quitting InDesign and then reopening it. Sometimes doing that can awaken a sleeping font.

Did you try Type > Find Font panel to change the font globally?