According to https://github.com/espressif/esp-zigbee-sdk/issues/275#issuecomment-1986330620 , the disassembly of esp_zb_main_loop_iteration is

4202075e <esp_zb_main_loop_iteration>:
4202075e: 1141 add sp,sp,-16
42020760: c606 sw ra,12(sp)
42020762: a029 j 4202076c <esp_zb_main_loop_iteration+0xe ...