I think it was mine, and somehow I sent it wrong.
When I saw this post come through I really hoped people would have replies, as my 14 year old has had what sounds like similar experiences.
The only thought I have to share is sometimes medication changes can help. We've made adjustments to my daughter's depression and anxiety medications twice with better results each time.
My daughter's mental health needs predate covid, but I see the isolation affecting my other kids.
Our area has very lax regulations, but we try to maintain the kids' friendships with video calls and texting but also by having different friends over to hang out on our back porch/back yard every couple of weeks.