Ah yes, I have found myself using SVG attributes more than CSS styles just to make sure they survive the transition to Figma.
In this case the text layer seems to be empty (if I edit it then hit escape the text layer disappears from the layers panel just like Figma does with any new, empty, abandoned text element). I suspect that Figma doesn't support textPath at all so the element and its content disappear rather than just losing the styles.