I’m not an expert, but I don’t think U mapper will know how many times the display is “folded”
you can see some details on rpi-rgb-led-matrix/examples-api-use at master · hzeller/rpi-rgb-led-matrix · GitHub
I think in your case, you can lie to the library and tell it you have 4 panels of 192x64
P4
^
P3
^
P2
^
P1 (which is 192x64)
Then you can use Vmapper to tell it your 4 virtual panels are stacked up and not horizontal