There’s a recent proposal of jamming a special unicode character, narrow no-break space, between every character in specific words as a way to make them stand out to sighted users without breaking screenreaders.
This sentence contains an e x a m p l e. It reads as the word “example” on Siri, but there are plenty of other screenreaders and environments in use where it reads as separate letters.
https://idiomdrottning.org/re-sperrsatz-emphasis