This is more of an FYI because I see many asking if they can go back to 16.1 on iOS. Apparently you can, but YMMV.
From Reddit
You may need a PC/Laptop
Install AltStore on PC (follow their instruction)
Download the previous .ipa file (Google it)
Install it
See this thread: https://www.reddit.com/r/sonos/comments/1cpd8eu/how_to_install_the_previous_app_on_ios/
Install Alt Store on Windows: https://faq.altstore.io/getting-started/how-to-install-altstore-windows
If you can’t find the 16.1 IPA you can follow these instructions to get it. Keep a copy of it and you will always be able to go back to it.
https://github.com/qnblackcat/How-to-Downgrade-apps-on-AppStore-with-iTunes-and-Charles-Proxy