Now all access to wifi settings have been removed, how to configure router from MacOS

Due to arthritis I can't use mobile phones.  I therefor only have MacOS.  

Until recently I could login to my local access point and configure settings on the access point itself.  

Now I am compelled to use the Xfi app to make any changes (this didn't used to be the case) but Xfinity have not clicked the option that enables the app to be installed on MacOS.  It is configured for iPhone only installation.

So now I have a new webcam on my network but have no idea of its IP address.  Can Xfinity re-enable local configuration on my router, or do I have to switch to another provider?