It’s a familiar process on how to add a guest post in Blogger. This is just wrapped around in a different keyword if you already know about adding or inviting Authors which is technically the same.
You can add a total of 100 people such as Admin, Author or Readers (this apply only if it’s a private blog)
When the person you invited or added publish a post/article. The person name or profile will be shown instead of yours
FIRST, Log in to your blogger dashboard and click on the Settings option
SECOND, Scroll down look for permission section and click on the invite more authors text
LASTLY, A small popup page will be shown, enter/add the email of the person you want to write a guest post and click on the send text
The person will have access to the blog as an author and create a post