ESP32-Wrover-E: GPIO15 and LoRa NSS

[smj_jac]

Dear all,
I'm using a Ra-01SH (SX1262) with ESP32-Wrover-E to test LoRa features.
NSS pin: 15
DIO1 pin: 26
NRST pin: 27
BUSY pin: 33
MOSI pin: 23
MISO pin: 19

Although I can't establish communication between two devices

As it is already soldered, I would like to first ask technical aspects of GPIO15 before desolder that.

Is it possible to use this pin, being it a strapping pin?

At ESP32-Wrover, the information about GPIO15 has its type with a "-". What is that?

Should I avoid this pin for cases like CS/NSS of LoRa?