D812 on 3CX unsupported

D812 is not officially supported by 3CX (v20 Update 5) yet. According to Nick at 3CX:

Its up to the manufacturer to submit templates and firmware tests before we release. They are not ready yet.

Lack of support is delaying our 3CX rollout indefinitely as I cannot justify purchasing older D7xx phones.

Can someone verify whether or not Snom has submitted the necessary templates and test results to 3CX?

Is there a custom 3CX template available for download from Snom for the D812, please?