Touch SLCD1 Xplained Pro (ATTSLCD1-XPRO) is bundled and shipped together with revision 4 of SAM L22 Xplained Pro.
ATSAML22N18A device revision B (or later) is mounted on revision 4 of SAM L22 Xplained Pro.
Pin-out changes have been made to the kit to get the correct functionality on the headers and connectors for revision B of the ATSAML22N18A device. See revision 2 for more details.