Yes, anyone can edit Wikipedia. And the edits usually appear immediately (although they can be taken down later).
And that can lead to some - shall we say - interesting “facts”.
For example, back in the summer of 2016 I went to Hillary Clinton’s Wikipedia entry to check about a date.
Some wag had inserted this in her biography: “Secretary Clinton’s hobby is collecting pictures of women’s bums. If you have a good picture of a woman’s bum, please send it to her.”
I couldn’t believe it! But there it was on Wikipedia, in black and white. I went back in about an hour to get a Print Screen shot of the entry, but it was gone by then. Too bad.
The John Seigenthaler case did it for me-——I’ve never trusted them since then.
.