Here's what you need to do inside Calendar tool in NexLvL CRM.

Set your availability?

Click on Calendar

This is where to choose the days you wanted to show available in your calendar.

If you turn this on, even though you have your set available business hours, it will only show some as available in your calendar.

Click the pencil icon to modify your available time.

These is where to manually set them.

Tick this to turn the schedule available or not.

Make sure to hit save when you're done.