Type CHSE Certified to get variants from Booking.com. Yes, possible to reserve such hotel not via WhatsApp from hotel. Often direct prices higher. Easier and faster to get hotel via online resources.

Example how to find CHSE hotel on Booking.com:

Start your search:

Double check is the hotel represented on official website or not:

Official government website is https://chse.kemenparekraf.go.id/detail-province/bali

How to find easy more variant of CHSE hotels?

You can try to use Google special search request like on this picture:

Ask people about their experience of CHSE hotel reservation in Facebook group:

Link to Facebook group is https://www.facebook.com/groups/welcomebacktoback.

You may find there reviews for the stay in CHSE hotels.