I have never tested with an iPod Touch. But there are issues related to the library imobiledevice that is used by Strawberry.
You can try to start strawberry from the terminal and see if there are any output.
Also running strawberry as snap has restrictions, you have to connect the correct plugs/slots.

We don't really have that. But you can select all songs in the playlist with CTRL + A, then right click and select queue, it will show a number in blue on the right side of the song title. However this will go away when the song is played.