Custom occurrence on recurring events/tasks for mobile

If I have an event that repeats on Monday and Tuesday same time each week, I have no option rather than create two different events with a "every week" repeat option.

I'd like to instead be able to choose specific days when the event repeats.

Similarly, I might have a recurring event on specific dates each month, though it's of a less importance.

Haven't checked if such level of customization is supported on desktop, but haven't found it on Android.