Hi Andriy Mahats ,
I've found this post after looking through the services that buypass offer and notice that while you don't offer wildcard DV certificates yet, you do have an ACME v2 test endpoint.
I've tried creating a certificate with certbot using the test v2 endpoint and requesting a wildcard certificate but I receive a 403 forbidden error with the message REJECTED_IDENTIFIER.
Could you offer any advice for using the test endpoint? Also, what are the limitations of the test endpoint, would it produce a valid certificate or is it purely for testing the ACME v2 standards.