Podnews offers a good overview of what is happening in the Podcasting transcript world.

https://podnews.net/article/podcast-transcripts-why-and-when

I have been writing code to enable AntennaPod to display transcripts

So far these 3 PRs have been merged

• Parse the tag
  • Parse podcast:transcript url and store in SQLite
• Download and store the transcript raw data
  • download and store transcript text
• Semantically parse the transcript in SRT and JSON format
  • Transcript semantic parsing

I am currently working on displaying the transcript on the currently playing episode screen

• Transcript displaying on cover fragment