After uploading and transcribing an audio, is there a way to download the synchronized transcription as a subtitle file?
No, you can only download lesson audio, not the text file. But you can go to Lesson Menu > Print lesson and copy-paste the text. That’s the best you can do, you can’t get it as a subtitle file.
I’ve tried, and the printed lesson doesn’t have timestamps. Fortunately, I was able to create a JS script to generate a subtitle file with timestamps from the available data.