Hi,
1) yes it is minimum quarantied program/erase cycles per flash sector
2) it is minimum guaranteed writes (32-bit) for given EEPROM backup to FlexRAM ratio.
You can refer to Flex Memory Endurance Calculator where you may choose written data specification (no. of updates, records, data size) and see how it affect endurance.
https://www.nxp.com/downloads/en/calculators/FME-Calculator.zip
For more information about the EEPROM, please take a look at AN11983 Using the S32K1xx EEPROM Functionality; https://www.nxp.com/docs/en/application-note/AN11983.pdf
BR, Petr