I would like to suggest that Logseq had a feature that allow us to edit a word in multiple occurrences. The simplest way, I guess, would be something like Find and Replace in MS Word and other text editors. You can always use some other editor to do this, but it would be nice to have inside Logseq.
If this is not something you’re doing often, you could bring up your notes repo in a solid text editor (like VS Code or Sublime) and do a find and replace there.