Hi Felix,
At first, I would like to ask did you set the growingThreshold value for the table??
If yes, how much is it?
if the growing threshold value is more than the number of rows present in the oData, then the "More" button will not be displayed.
Actually in my case, pressing the More button gave me more data, but it was not making the oData call for back-end. For that I made some changes in oData call.
I hope it helps.
Regards,
Aashwin Jain