Capabilities are enabled after sub-entity verification checks are completed. If you haven't received a {check}_passed or {check}_failed webhook, it is likely there are outstanding requirements due.
See Onboard sub-entities to confirm you have sent all the required information.
If you have provided all the required information and have left sufficient time to receive notifications regarding the outcome, Checkout.com may be conducting a manual review. Manual reviews take longer to complete and may delay the check result and capability update notifications.
If you have any concerns, please contact your account manager or request support.