Im new to booking.com.
I just want to ask help on how i can be in control of guest's reservations since they can automatically book without me knowing. I want all their reservations be approved by me first before they can get confirmation that their booking is already approved.
BDC operate on an automatic book and confirm basis, as stated in your contract.
Therefore, no you cannot personally approve bookings before confirmation.
Your only control in this regard is of rates and inventory, plus cancelling bookings that do not pay or provide invalid payment details.
One possibility is reach out to guest if you cant accommodate those dates...
1. Offer to change dates with you directly, leaving existing on BdC as is.
2. Offer credit for same number of nights if they book directly not via OTA.
3. Full cancel and refund, by message first then click request cancellation in detail page, choose 2nd reason and submit.