So, 128x64 panels are pretty common, they all come with FM6126A chips, and the ones I tried with Louis’ library only half worked, but they work great with the rPi driver.
To be honest, for 128x128 and above, you’ll need a teensy 4 and hope louis’ library works ok with the panels you got, or use the rPi driver which works fine with them, as that’s what I use.
Note too that you may end up with ABC panels instead of ABCDE, but they are supported too: https://github.com/hzeller/rpi-rgb-led-matrix/issues/823
As for returning panels that you can’t drive, forget it. I did get some panels replaced because they had pixels that fell off during shipping, or in the case of ABC panels, I ordered ABCDE and they sent ABC by mistake, so they replaced them.