transcription

Word online- if you have a 365 plan/free school account, you can upload an audio file, select the language and Word will transcribe it for you (see how it works here) [H/T Evaristo M.]- very accurate ⭐
sonix.ai- More info on how it works here
Anthiago: Speech-to-text transcription of Youtube videos. (only US English)
https://www.speechtexter.com/ (you can play a recording or dictate)

Perhaps also useful:

You-tldr: Speech-to-text transcription of Youtube videos. (transcribes what YouTube has already transcribed in a more teacher-friendly way than the subtitle file)