We check your account for new listings every 2 hours.
You can, however, speed up this process manually after you have created the listing on your booking channel.
If you added a new listing and want to speed up this process, you can re-sync your account.
Go to Settings, then click on Connected Accounts.
Select the connected account you want to re-sync.
Click on the Edit button next to the connected account hosting this new listing.
Choose the Re-sync option.
You will see your new listing being recognized in Properties, under the "New Properties" and with a green highlight.