I think it's going to take a bit of googling but I'd start with Etsy. I just googled wall mirror ethnic wood frame because it had a sort of moroccan feel to me. I found this. I wouldn't call it an exact match but it's similar-ish. You just need to find the right key words and you'll find what you're looking for. Good luck!

I love that room, too. Not my style but it's really pleasing to my eye. That mirror could very well be a custom piece. It almost looks like reclaimed wood, maybe from some kind of print shop/factory? And it's definitely not a size that you would commonly see for sale in the usual places. Can you contact the decorator or real estate agent (don't know if it was a designer open house or a real estate open house) and see if they will share the source?

Try Pier 1, Homegoods or wayfair.com

Thanks everyone. I am searching but still haven’t found something similar

WOW that is huge. The closest I found was the Etsy mirror. Are you looking for something with the same type of detail in the wood or just a rustic look? Lots of rustic wood frames and it seems it would be fairly easy to make one if you're just looking for a rustic look. Not sure about how to get the detail/pattern...paint possibly.

https://www.uttermost.com/c-7-oversized.aspx

Thanks but still cannot find a match to that mirror