Facebook is more permissive with Unicode than most people assume — as long as you’re not trying to style your legal name.
Posts (the main feed)
Facebook post text accepts the full Unicode range. Opening your post with a Bold Sans headline or a Bold Script signature makes it stand out in feeds where everyone else uses default text. The caveat: Facebook’s algorithm slightly favors posts with clean, readable text — heavy Unicode everywhere may reduce reach. Use styling for emphasis, not for the whole post.
Bio (intro field on your profile)
The short bio field on your profile is a natural place for a signature styled phrase. Unlike your name, the bio field accepts Unicode freely. A single styled line that captures your vibe reads as intentional without triggering the real-name filter.
Groups and Pages
Group names, page names, post content within groups, and comments across groups and pages all accept Unicode. Communities often develop styled naming conventions (bold category headers, decorated event announcements) that create visual hierarchy without needing platform features.