Seems it's really EEPROM emulation using a page/sector of flash on this chip. So most EEPROM rewrite endurance tricks are actually using FLASH endurance tricks that reduce sector erase cycles.
https://github.com/jwrw/ESP_EEPROM
https://github.com/xoseperez/eeprom_rotate
https://github.com/jwrw/ESP_EEPROM
https://github.com/xoseperez/eeprom_rotate