We would like to say that. Yes....we did tape-out of the ASIC some time ago.
Good. Presumably you have working prototypes in your lab checking EMC compliance as well as working on SEMCO/CE approvals.
You know of a miner manufacturer that waited for CE approvals?
Show us.
It depends how it's being sold. Consumer appliances which plugs into the mains may require approval depending upon the country. There are also EMC requirements so the miner will not disturb the TV, WiFi, or whatever of your neighbor.
They're not cutting corners, or risking their business. This isn't being marketed as a consumer product, but business to business, even so if it is to be sold in the European Union, they won't skip on a necessary requirement. Avalon were v.cheeky sending the items as research products:
https://www.gov.uk/ce-marking