Using a custom Delphi DataAbstract server, I was able to determine that the LoginService works with FMX IOS and that data could be pulled.
Not without some problems. Tables originally showed to have problems on opening. But if I tried a second time on the same table, it opened and pulled data from the server.
Was not able to visually bind to the DA tables but tested by manually populating a FireDac memtable with the data from the DA table after the DA table was opened. The FDMemtable was bound to a TListView.
Tomorrow, I will try to append, edit, and delete records back on the server. And I will setup some FireDac SqLite tables in a database on the IOS device and load some large tables and see what I run into on that.