Calendar events not showing

I am using oppo mobile with Google calendar. Klwp not showing events.

You had choose All or Google calendar in the settings>calendar to show in Klwp?

In settings, I choose all . There is no Google calendar. I am unable to find Google calendar.

Ahh, I don't use Google calendar and I don't have it, I don't know what the problem can be, but if the Google calendar don't show in the settings, this is a problem.