appstream data should be named metainfo
see e.g. https://source.puri.sm/Librem5/calls/-/blob/master/data/sm.puri.Calls.metainfo.xml - metainfo is the new, appstream.xml the old name.
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
see e.g. https://source.puri.sm/Librem5/calls/-/blob/master/data/sm.puri.Calls.metainfo.xml - metainfo is the new, appstream.xml the old name.