If you search Digi-Key for the part number ESP32-PICO-MINI-02 from Espressif Systems, you may find the similar part number ESP32-PICO-MINI-02-N8R2 instead.
Confirmed by Espressif, ESP32-PICO-MINI-02-N8R2 is the complete ordering code for ESP32-PICO-MINI-02.
The suffix breakdown is as follows.
The N8 = 8MB of Flash
The R2 = 2MB of PSRAM
The part’s function is the same.
Applicable part numbers
1965-ESP32-PICO-MINI-02-ND
1965-ESP32-PICO-MINI-02-N8R2DKR-ND
1965-ESP32-PICO-MINI-02-N8R2TR-ND
1965-ESP32-PICO-MINI-02-N8R2CT-ND