https://www.mendability.com/autism-therapy/social-skills/4-simple-tests-to-check-1-autism-warning-sign-eye-tracking/
I just posted a couple of articles above that I believe will be helpful for you.
I’d advise to speak with HV. It’s very important milestone xx
https://www.speechie.net/starting-early#:~:text=We%20have%20very%20strong%20evidence,later%20speech%20and%20language%20delays.