Steamers on Garda you have asked about

Arciduca Rainieri wooden paddle passenger
Aug 1825
104x15ft
2 engines 24nhp from England
1848 rebel flotilla

Benaco paddle iron passenger
1844 Escher & Wyss, Zürich #22
low pressure vertical oscillating 100 nhp by builder
1848 rebel flotilla
by 1852 kuk Marine purchased for 48064 Fl.
1859 sank during war over Lombardia

Austrain forces at Gardasee (Garda Lake)

4 large 14 small vessels found in Torbole, Riva, Ponale
and armed with:
4- 12pdr
4- 6pdr (from Franzesfestung )
6 rocket
They have nearly no sailors, so the flotilla was not active.