Customize Signup Form (add an intro sentence)

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2

You can make those fields required.

You can also turn on the developer toolbar and find that there’s a plugin outlet create-account-header-bottom.

This image shows a green-themed graphic displaying a step-by-step guide for account creation, including sections for email, username, name, password, and user field input. (Captioned by AI)
This image shows a green-themed graphic displaying a step-by-step guide for account creation, including sections for email, username, name, password, and user field input. (Captioned by AI)573×651 24.5 KB

oh! And Custom Components -- add button or text at any plugin outlet will allow you to make a bit of text that gets inserted there.

The image shows a sign-up form on a website asking for an email, username, name, and password, with a warning message indicating that it is designed to detect spammers. (Captioned by AI)
The image shows a sign-up form on a website asking for an email, username, name, and password, with a warning message indicating that it is designed to detect spammers. (Captioned by AI)524×564 24.5 KB

You’d need to do a bit more work than I did to make the HTML and/or CSS such that it would put the text exactly where you want it, but this is a good start.