There is nothing in the FAA wording posted that suggest the FAA refusal is to do with a SOLI ICAO transferred licence, even if the original German poster thought so. When you transfer from your current/ original state of licence issue (SOLI) then that is what you have done. The new state does not base their licence issue on the previous NAA because they now hold all your licensing records and they become the issuing authority. This is what I mean by the "history" not being relevant.
Only having all the information is it possible not to be tempted to go up blind alleys. Do your own application based on your current licence but do not use language, based on assumptions, that can be misunderstood. If your Austrian licence is an EASA compliant licence but importantly issued in accordance with ICAO: i.e. not a LAPL or a national only PPL, that should be enough.
Last edited by Fl1ingfrog; 9th Feb 2022 at 17:38.