Hi @rjwats

I tested with minor tweak of platformio.ini and ESPFS.h, at least it builds fine with my "hacky" esp32 library here: https://github.com/lorol/LITTLEFS
See the PlatformIO note at the the bottom of README.
You can add also to build_flags -D CONFIG_LITTLEFS_FOR_IDF_3_2 until the core repositories get moved to newer IDF

Update:
It seems to be actually working. Few "errors" on serial console, but they are due to:
https://github.com/espressif/arduino-esp32/blob/4638628873a061c36faffebe4d146d13f960076d/libraries/FS/src/vfs_api.cpp#L57
I don't know what to do with them :) SPIFFS is different than LittleFS and we have to live with that ...
... see also here: espressif/arduino-esp32#4138

Update2:
I forgot to mention I needed to add a /config folder (and a dummy holder.txt file in it) to project data directory before flash the FS image. Otherwise it will not be able to create and save the config jsons. I guess again SPIFFS creates folder/file at once (as file) while LittleFS not, unless we make-up backwards as on ESP8266 is done.
It is maybe the best to have all 7 x .json files created as empty files under /config folder. Probably other tweaks ...

BTW the error [E][WiFiGeneric.cpp:117] wifiLowLevelInit(): esp_wifi_init 4353 is present also with standard SPIFFS setting

Appreciate your validation.

Thank you,