await bot.change_presence(activity=discord.Activity(type=discord.ActivityType.listening, name="a song")) code example
Example: discord.py watching status
await bot.change_presence(activity=discord.Game(name="a game"))
await bot.change_presence(activity=discord.Streaming(name="My Stream", url=my_twitch_url))
await bot.change_presence(activity=discord.Activity(type=discord.ActivityType.listening, name="a song"))
await bot.change_presence(activity=discord.Activity(type=discord.ActivityType.watching, name="a movie"))