Is there any way I can set the calendar to be a different view, only on mobile? So I would like to have Monthly view on desktop, but Weekly view on mobile. The reason being that the mobile Monthly view is kind of useless. See pic below.

I'm afraid not - we don't detect what type of device is visiting at the server level where the corresponding output is generated, we simply adapt the output at the browser level using a technique called "responsiveness". You would need a custom plugin to do this.