Hmm. I don't know where you heard that but it would open Dominion up to a big lawsuit unless Smartmatic was a co-plaintiff in the suit.
Evidence from discovery is not part of the public record until it is entered as an exhibit in the case. If there is confidential information contained, that gets redacted from the public record. The parties see the unredacted version, but the public does not.
When a plaintiff files a request for production, the defendant has the right to file an objection. The request may be overly broad, or not relevant to the complaint, whatever. A "show cause" hearing is scheduled, the parties argue their positions, and the court makes a decision.
If the plaintiff prevails, the defendant might still not produce- in which case the plaintiff has to file a motion to compel, another hearing is set, etc.
If the defendant still does not produce, he will be in contempt.
The evidence in discovery has to be held confidential until such a time as it is entered into the public record- Dominion cannot just share the information with anyone they choose.
Smartmatic has to file their own requests for production and go through their own process.