Unfortunately not! My dev for avif.io had to modify rav1e in order to allow for progress tracking:
https://github.com/justinschmitz97/rav1e/commit/d85171617fa9e79f662fcd842ce0d1031822134d
https://github.com/justinschmitz97/rav1e/commit/d85171617fa9e79f662fcd842ce0d1031822134d
Don't think this code is helpful to you, but sharing nonetheless, maybe it can help some way. I can imagine callbacks for progress tracking being useful for online converts, but also for image editing softwares like GIMP or Photoshop. Would be cool to have it!