These scribblings are public. Some of them come from or are linked from social media.
For example: @kornelis@mastodon.cloud.
On my homepage I have this spot: <www.keesboomsma.nl/notes>, that I use specifically for some of the notes I make while reading or researching.
I’m still looking for a microblog platform in the fediverse that allows real posts (not constrained by a character limit) and is not hopelessly cluttered or crippled (or still in development). For now I will post writings that contain too many words on my own server.
FWIW, I own ＜www.ketmia.net＞, ＜www.ningen.one＞, ＜social.ningen.one＞, and ＜www.jiten.nl＞.