Thanks for your response. Based on this response, I would like to ask two follow-up questions.
1. Is it okay to get 2NL without DS 260, or submitting DS 260 itself will benefit me somehow (for example, is something that the officer will ask me on the interview day about it)?
Because what I understand from DS 260 submission is that it is the main trigger for 2NL. However, it seems only paying the DV fee (without DS 260) and waiting (my CN won't be current soon) may trigger the 2NL. So I am thinking of just paying the fee right now and wait (And in the case scenario of not getting the 2NL after a long enough period, I submit DS 260).
2. I can access it now through their website. However, when I want to print the i-94 form, there is an expiration at the bottom of the page. For example, I tried it today, and the expiration was until the end of January 2023. Thus, if I download it today, it will have expired by the time I want to file my case. Is it okay to send them an expired i-94?
Thanks for your time in advance.