This seems to be something that has to be added in the CSR, which puts it into the domain of ACMESharp. They have an open issue about this: https://github.com/ebekker/ACMESharp/issues/249
This should be possible with a 2.x release since we now generate our own CSR. Removing the "pending..." tag.
This is in the latest alpha build using the --ocsp-must-staple parameter.
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This seems to be something that has to be added in the CSR, which puts it into the domain of ACMESharp. They have an open issue about this: https://github.com/ebekker/ACMESharp/issues/249