After looking through the docs of discord.py for a painful amount of time, I still can't find a way to get messages from a thread. Hopefully there is a function for this, but am open to other hacky things to get this working.
async for message in channel.history(after=start, before=end):
if message.type == discord.MessageType.public_thread:
#await for m in message.fetch_messages()????
forum = bot.get_channel(111111111111) # forum channel ID
thread = discord.utils.get(
forum.threads, id=22222222222) # thread channel ID
)
# instead of the above could simply do:
# thread = bot.get_channel(22222222) # thread channel ID
async for message in thread.history(after=start, before=end):
... # do something with message