WLED_0.x.x_ESP8266.bin NodeMCU, Wemos D1 mini, ESP-12, all ESP8266 with 4Mb flash. Recommended. WLED_0.x.x_ESP32.bin All ESP32 devices (try this if the WLED-AP doesn't appear after flashing) ...
If the ESP32 is new, you will need to flash the bootloader first. This is not required if you had an Arduino sketch running on it before. You can find the bootloader file in the assets for the 0.9.1 ...