Their terms of use show that they do not provide custodial services, which means that if there is a problem, you may be redirected to a third party who may require Kyc and they have some age-related conditions.
https://swap.rabbit.io/terms-of-useIn addition, on top of their ToS it's also stated you need to consent to third-party called SwapSpace.
1. Consent to Third-Party Terms of Service
By using SWAP.RABBIT.IO, you agree to the terms of use of SwapSpace. SwapSpace is a third-party service provided by SwapSpace LLC, and its terms of use can be found here -
https://swapspace.co/terms.
Your use of SWAP.RABBIT.IO implies consent to both SWAP.RABBIT.IO's terms and the terms of SwapSpace.
And when i check SwapSpace ToS, it state about KYC on certain cases.
By accessing the Services, You agree to provide Us with current, accurate, and complete information about yourself. You hereby guarantee that the information You provide to us is true and accurate; that You will pass through the AML/KYC procedures from time to time if required;