Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain _9cceee987aefe0819c3dee452ad0614a.pip.axcient.com is not the root of its zone.
Instead, try zone transfer on tfmgdnztqk.acm-validations.aws .
Instead, try zone transfer on tfmgdnztqk.acm-validations.aws .