It’s not ever helpful - once you do that you could begin the process of the paperwork and get stalled in your attempt - their are several ways to marry .
Engaged is an interesting term in and of itself ... I won’t ask all the usual questions of tell all the funny stories of engagements over the years - decades ... what visa are you riding in with ? Elite ? O? An engagement is not an exception for this period and from California? You aren’t getting in - you will
Need Covid insurance a test and if you do go in and out you should plan on at least the 5 year elite ...
The United States unless you are showing extreme symptoms of flu like disease ... so you can not get tested and so you can’t get a certification that you are clear ... unless you are an nba player or movie star etc ... so good luck with that part of the paperwork