It appears Google has replaced the old form with web components, which are like custom HTML tags. Autofill's text/password/select/checkbox/radio rules only work with standard HTML tags like <input>, so they won't work with the web components in the new form, e.g.:
https://i.imgur.com/m9Qgwzu.png
To work around this, you'll need to use a JavaScript rule. This worked for me (to improve reliability, I added a 1sec delay before executing the script):
setTimeout(() => {
document.querySelector('[aria-labelledby="mat-label-copyright-acknowledgement"]').click()
}, 1000);