This looks like PR propaganda put out by Dominion.
Everything Ive seen indicates there is no audit trail. That being the reason the Democrats use this so as not to get caught.
The foregoing provides only the foundation for election security. Elections in the U.S. are conducted at the state and local levels. State and local officials across some 10,000 U.S. jurisdictions implement comprehensive safeguards to protect their election systems, and those measures reinforce those built into election hardware and software. These measures include physical security for election hardware and computers running election software; network security; procedural safeguards; comprehensive and transparent pre-election testing of ballots, voting machines and tabulation equipment; close supervision of voting by local election officials and poll watchers; paper-based audit trails; strong chain-of-custody requirements for ballots, prohibit tampering with election systems.
https://www.copyright.gov/1201/2018/comments-021218/class10/Class_10_Opp%27n_Election_System_Providers.pdf