Well as a start, you can definitely drop the section about finding modules. You can usually google python + async + what you want and find something that solves your problem. We don't really have space to spare, so only keep the essentials.
Without a proper explanation, saying that async is flat out faster than sync is misleading. If we can't fit in when it is faster, we can drop that part completely.
Use some line breaks here and there. Blocky paragraphs don't work too well, and people will just end up glossing over, try to limit the paragraphs to two or so lines.
Minor note: You missed Python in Real Python at the bottom.
This does not take into account grammar/spelling, those can be reviewed later.
Reference image of breaking text up, with no other changes:
before: #bot-commands message
vs after: #bot-commands message