Google calendar only adds default

I realized that the synchronization of the elementary calendar app is not complete it synchronizes the personal events of the google calendar plus other events such as lunar events, birthdays, and holidays which are events that google offers as a complement it does not synchronize.
I believe that it would be nice for him to synchronize everything and it would also be very good to change the way to add the google calendar. after login this window shows the permissions and we press the yes which is practically what gnome accounts does.
another way to log in more smoothly is using the online accounts found in the system settings

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