Widget Monthly View
Currently an added benefit on that I see to the Google Calendar widget and Samsung Calendar, compared to the Proton Calendar, is an array of widget display options.
Currently, Proton Calendar only allows for an agenda-style view, which just lists in sequence what is going on. But it would be helpful to see your month at a glance without actually having to click into the app. Or, like the Samsung App, it gives you a month view and an agenda view side by side.
Giving users the ability to pick a style fits their use case will improve the number of users leveraging the widget, instead of only having a single option (take it or leave it) style.