How do I stop Safari from suggesting a strong password?

Perhaps there may be a prompt, to encourage higher-level security in your device?

~ If so, could be time to attempt an improvement to what may be a lapse there.

Password security recommendations - Apple Support

//support.apple.com/guide/security/password-security-recommendations..

Passcodes and passwords - Apple Support

//support.apple.com/guide/security/passcodes-and-passwords..

[Where you may already now have 'two factor' levels, in place; there may

be requirement to elevate other level, to match a new minimum security.]

Automatic strong passwords - Apple Support

//support.apple.com/guide/security/automatic-strong-passwords..

"Weak, reused, and leaked passwords are either indicated in the list of passwords (macOS)

or present in the dedicated Security Recommendations interface (iOS and iPadOS). If the

user logs in to a website in Safari using a previously saved password that’s very weak or

that’s been compromised by a data leak, they’re shown an alert strongly encouraging them

to upgrade to an automatic strong password.." - Apple Platform Security Guide pg 126

There may be a need to contact Apple Support directly instead of

trying to decide from information links, within a Community forum.

Download this guide as a PDF - Apple Platform Security (219 pg)

//help.apple.com/pdf/security/en_US/apple-platform-security-guide.pdf

Automatic strong passwords

"When iCloud Keychain is enabled, iOS, iPadOS, and macOS create strong, random, unique

passwords when users sign up for or change their password on a website in Safari. In iOS

and iPadOS, automatic strong password generation is also available in apps. Users must

opt out of using strong passwords. Generated passwords are saved in the keychain and

kept up to date across devices with iCloud Keychain, when it’s enabled."

By default, passwords generated by iOS and iPadOS are 20 characters long. They contain

one digit, one uppercase character, two hyphens, and 16 lowercase characters. These

generated passwords are strong, containing 71 bits of entropy."