Aalen to Stuttgart can’t. Stuttgart to München Can’t.
“using that pass” means not taking the direct train line. And stopping locally.
Don’t ask me, ask a DB employee telling me that pass isn’t valid for those connections.
Edit: here’s the carve out
Please note, however, that the Deutschland-Ticket is not valid on trains operated by DB Fernverkehr AG or other long-distance providers such as FlixTrain (e.g. IC, EC, ICE, as well as RE operated by DB Fernverkehr AG). DB Fernverkehr is currently in talks with the German state governments and authorities about exceptions on certain sections of line.
The Deutschland-Ticket is currently also permitted for long-distance trains (IC, EC, ICE) between Rostock Hbf and Stralsund Hbf.