Any suggestions for how to handle derealization

Not a therapist, but when I didn't have access to therapy I listened to a lot of Buddhist lectures, I recommend them even if you're an atheist. If philosophy isn't your thing, I also recommend podcasts/lectures on nature and biology. It was a big help in grounding. If you aren't an atheist, I would recommend listening to something similar from your own religion. (Younger atheist-me would be shocked I'm suggesting this, lol) The reason I suggest this isn't "turn to religion" but for the same reason as the above: To ground you.

remember that derealization is a symptomatic not a mental illness. the less you think about it the faster it goes away. i know easier said than done but accept how you’re feeling. i know it doesn’t feel normal but go on like it is. the two times i’ve been through it i can’t tell you the exact time when i got out of it because one day i realized everything was normal again. it’s a trauma response in your brain. it’s actually suppose to protect you, the more you pay attention to the feeling, the more you panic, the longer it stays. accept it. continue your life it will go away i promise.

I appreciate the suggestions, thank you.