Yes, we have. There were compatibility issues that I am still working to resolve.
Source: Am the LVFS and fwupd maintainer.
Still, I have been changing our firmware updater to better suit LVFS and fwupd for when you finally decide to reconnect in a more positive way.
Not trying to tone police you, but you run a project that necessitates bringing vendors to the table. Odd to publicly bash one that's trying to work with you.