A toot doesn't carry with it the same authorial expectations as a scholarly manuscript.
If you _want_ to acknowledge it, here are some thoughts on AI authorship – including thoughts on what wording to use in an acknowledgement:
https://sentientsyllabus.substack.com/p/silicone-coauthors
If you _don't_ want to acknowledge it, (a) you would be allowed to do that - the account is under your control, the material is not copyrighted, and you are accountable for the contents. (b) it would be hard to tell, since detectors do not work.
The bottom line for me is: look at the content, not at the hand that wrote it.
🙂