macOS Big Sur - unnotarized 3rd party quick look plugin? After updating to macOS Big Sur 11.0.1, a 3rd party epub quicklook plugin stopped working:

I've already forgotten how I installed the plugin (from Homebrew cask or downloaded from the web, but judging from the error message, it was the latter one). If it's an unnotarized GUI app, I'd remove the com.apple.quarantine attribute from the app so that it would work, but I don't know how to do that with a quick look plugin.
Is there a way to make the plugin work?
You do the same thing as with an app. QuickLook plugins are installed to ~/Library/QuickLook.
You can run xattr -d -r com.apple.quarantine ~/Library/QuickLook to remove the com.apple.quarantine attribute from all QuickLook plugins.