When opening a pdf or svg from an external application, such as Illustrator or QGIS, text on a curve gets broken into separate objects. It would be ideal for the text path to be recreated and have editable text along the path.
Attached is an example of what I'm referring to.
I'm a cartographer. My primary tools for the last 25 years have been a combination of Illustrator plus a plug-in suite called MAPublisher. I've been very interested in using the Affinity suite of programs in combination with QGIS. To use Affinity Designer, type on a curved path that is imported from other programs is essential.