Redirect home page only if no query string

You should be able to create a regular expression to match this:

https://redirection.me/support/redirect-regular-expressions/

Yeah, I looked through that page but I don’t see any example of a negative condition for query strings. Can you point me in the right direction for what the regex rule would be for this?

Sure, it’s only a general guide for regular expressions. You can find more detailed guides in the ‘Testing Regular Expressions’ section of the page.