Configure NIOS firmware burning interface

Dear@JitLoonL_Altera

I am now doing the following:
1) add NIOS II.

2) add UART which is used to communicate with outside MCU.

3) add SPI_ADC which is used to initialize ADC.

4) add SPI_Freq which is used to initialize frequency mixture.

5) add JTAG_UART which is used to program/burn bitstream(sof) and firmware(elf).

6) set NIOS vectors page as ROM.s1 and RAM.s1.

My questions are:

--> are my upper settings correct?

--> For JTAG, it is not added by Platform Designer automatically, but added by me manually. Did I add it correctly? how to export JTAG_UART's pins?

The generate nios_core interface is shown in the following picture from which we see that there is not JTAG pins exported.