@Dancing Strawberry Please note that forceChangePasswordNextSignIn, whether set to true or false, applies only to the next sign in, which you already accomplished by the reset. After the reset, your passwordProfile settings have already been applied and the property is set to null.
"forceChangePasswordNextSignIn": false means either no password reset at next sign in or it could mean you'll be using the custom policies or user flows to reset the password
Hope this helps. Thanks!