PSA - When threading, please use the public for initial post, unlisted for follow-ups standard. When you don't, your thread clogs others' feeds. And please please please don't boost every post in a thread.
@jimiadams
Thanks for the tips. How does one change the publishing level of an already published posting?

@chin delete & redraft has been my approach, but it may be available via edit, which is only available on some instances (& not my current one) as far as I can tell.

(Coincidentally, I just did that with this post after failing to heed my own request!)