According to this Tom’s Hardware article (https://www.tomshardware.com/desktops/mini-pcs/mini-pc-maker-ships-systems-with-factory-installed-spyware-acemagic-says-issue-was-contained-to-the-first-shipment) it isn’t firmware based spyware but just existing on the machine drive.

They were also found on the restore partition so a full wipe and fresh install would eliminate the issue. AceMagic have also claimed that the issue was isolated to the first round of shipments.