Hey there Trundle,
We'd like to help answer your questions regarding your Beats Solo Pros.
We've looked up the features of your Beats model and it shows it has a noise cancelling feature. Check out: Beats Solo Pro Noise Cancelling Headphones
For your second question, we do see that it has automatic device switching between iOS, iPadOS, and Macs with macOS Big Sur installed. A Mac with an M1 would be compatible with macOS Big Sur. For more details, please review the section 'Even More' here: macOS Big Sur - Features
Take care!