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 _c3ee562bef84ca43f443bfe6d652accb.api.axcient.com is not the root of its zone.
Instead, try zone transfer on hkvuiqjoua.acm-validations.aws .
Instead, try zone transfer on hkvuiqjoua.acm-validations.aws .