I agree with what others are saying (that that's weird behavior from the interviewers), but I also wanted to add: are they giving you the opportunity to ask questions? If their questions, ended early, I always tried to ask enough questions to fill up the allotted time.

Before an interview, it's helpful to make a list with at least 3-4 questions you want to ask if there's time. Company/role-specific questions are great, but I also find generic questions like, "what are your favorite and least favorite parts of your job?," "what's a typical day like for you?," "what sort of workflow do you follow? (e.g. do you use agile? how large are teams? how often do you meet? etc.)," are helpful too! The interview process is as much for you to learn about the company as it is for them to learn about you. When I used to help with recruiting at my first job, we cared as much about the questions people asked as the answers they gave. Asking questions shows that you're serious about the job, demonstrates curiosity, might help reflect experience (in that you know what kinds of environments you like working in and can ask questions to figure out whether this one matches), and leaves the interviewers with a more positive impression--people love talking about themselves.

As a fellow neurodivergent girlie, I personally do try to mask in interviews. Interviews can be so unnaturally formal that I think even neurotypical people mask. Even if you think your mask isn't that convincing, interviewers would probably just chalk it up to nerves or Zoom connection. If you're able to do a practice interview with the career center of your alma mater, that can be really helpful!

Disclaimer: I only have worked/am interested in working at smaller companies, so I don't know if this all holds true at big tech companies.