Many of the articles do have references on the DRM status. Here’s an example indicating verification by a staff member. I personally tested a bunch of the games for DRM and noted it back when I contributed. Until recently, most of the games released on Epic were DRM-free. Even the Sony games were notably DRM-free on Epic before they were released on GOG. Nowadays, it’s more common for the new ones to use EOS and have it function as DRM.