Before the latest ClickUp update to the Google Calendar integration, you were able to have the integration active on your account without the more intrusive permissions that allow ClickUp to edit, share, and delete calendars.
For privacy and security reasons, please consider allowing a read-only integration with Google Calendar where users can view their calendar within ClickUp, without having to allow click full access to "edit, share, and permanently delete all the calendars you can access using Google Calendar".