When people using a Pixel 8 or Pixel 8 Pro tried to install benchmark apps from the Play Store, Google blocked the installation and falsely claimed "This app won't work for your device".
According to the 3DMark playstore page, the last update was Sept 21, 2023. Version 2.3.4869. Android 14 came out October 4th, making any incompatibility likely a temporary problem.
Unless there's a quote from 3DMark explaining how everything is dandy in their end, I'm not buying what you are selling.