This article is from Yahoo it explains how the Trump admin wanted for months to force changes that the commission wouldn't do until Trump eventually just fired them.
I am cutting and pasting the relevant part where it mentions the EAC involvement with ballots. It doesn't say certify more Trump wanted them to just add a citizenship requirement to the ballot regardless of the law
And of course the Slaughter Ruling gave him the power to fire them
"Some officials were frustrated with what they saw as the Election Assistance Commission's slowness in updating guidelines for states on voting machines, the sources said, while some also wanted it to add a proof-of-citizenship requirement to its national mail voter registration form and address other election-related priorities of the administration."