It seems like for whatever reason, your local network or firewall isn’t allowing your phone to access your computer directly. You might want to check your firewall or router settings to see if you can unblock this.
If that doesn’t work, another alternative is to switch over to the Expo toolchain (which will work with your project), such as XDE or exp. These offer a “tunnel” option which should solve the issue. One caveat is that these tools, unlike CRNA, require you to register a user account.