@Applicant2021me @seasickmermaid Last year I did an interview with Austin, mid Feb. They said they'd get back to me 'by the end of the week'. (I believe I interviewed on a Tuesday or Wednesday.) Didn't hear a peep from them and waited to email until the end of March. They apologized for the delay, blamed COVID (even though this was the very start of the pandemic and I interviewed several weeks before it hit the US) and very shortly after getting back to me, my rejection was posted on the application portal. All of which made me think that they forgot to get back to me. I wish I had emailed them sooner for my own piece of mind.
Take this for what you will. My opinion is that if you've waited 3 weeks, you're probably fine to send a brief, polite email asking about your status. Best of luck!