Why don't my fonts load on export?

Sorry, I normally include this info. Pr is 24.2.1 (build 2) and the OS is Windows 10. I've had to go down the PNG route previously and it is a long-winded work-around!

Hi. They are already. Unless I'm reading this incorrectly, Myriad Pro (one of the problem fonts) is installed locally:

Hi. Yes, they show as 'in Adobe and other local apps'. I have a few that say 'a font could not be added due to a conflict' when hitting the recycle button, but these are not the fonts I am having a problem with.

This is unusual and unexpected.  The font being used while working in Premiere Pro should remain active while exporting.

Which version of Premiere Pro is this happening with and under which operating system?  Also, what is being used for font management?  

If you're exporting with Adobe Media Encoder, what happens if you export using Premiere Pro?

If you are not able to get the font to remain active, I would consider promoting the Graphics to Source Graphics, exporting them from the Project panel or Bin panel as still images with an alpha channel, and then replacing the use in your Timeline.  Another work around would be to create the titles in a layered Photoshop document and then save them as PNG files for use in Premiere Pro.  That's more work than should be necessary, but will maintain the appearance of the text.

Look for your font on the web and install in your OS.

Do those fonts show in the Creative Cloud Desktop app's Fonts tab?