At least on my phone Galaxy S24 Ultra and One UI 7 the reminders are easy to miss. It would be awesome if they could be more similar to an clock alarm that rings and that I have to dismiss manually. I just missed a meeting while the phone is just 30 centimeters in front of my face.
A lot of people dislike the Proton Calendar app; it is buggy on both the Android and iOS platforms. This calendar is already really good, and adding support for Proton Calendar would make this calendar app even better.
Can I suggest to add the option that I can name the different colours in the filter. For example "yellow" could be named "Sport", "green" could be named work, etc. That would be even better or easier to categorise the calendar.