Hello,
we are talkin about the "Graf van Bylant" ?
No, she was not a former paddlewheeler.
Last build Rhine paddle steamer was the 1929 build "Mainz". In the same year also the last paddletug "Toulon" was launched.
Namely after WW2 some smaller screw steamdriven tugs were launched, but none paddlewheeler, also not driven by diesel.
Greetings
Thomas