You can cross out text in Discord by using the tilde key available on physical and digital keyboards. By placing two tildes on either side of your text in Discord, you can cross out that text.

The blue Discord logo at the top left labeled “Home.” Click or tap this to see your list of friends and any DMs you’ve received. There are two main ways to communicate on Discord ...

no one will know that it was there. Then you can retype it and make sure the strikethrough is only where you intend it to be. Note that if you're using Discord's text to speech feature ...