as suspicious as the domain may look, it does link out to personal.okta.com for account creation. the privacy policy is also a link to okta.com. despite the chatgpt reference, it appears to be a legitimate marketing domain for okta.
No links found on okta.com. Altough of course signing up on personal.okta.com is safe (as safe as it is to use okta anyways, they don't have the best track record exactly)