Hi,
In order to program the configuration of EPCQL, first you need to make sure the MSEL pins are set to ASx1/x4 mode . You should be able to check this dip SW1 settings under Table 8. Configuration Mode Settings from the Cyclone 10 GX dev kit user guide from the link below:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug-c10-gx-fpga-devl-kit.pdf
Then, you need to use the SFL (Serial Flash Loader IP) method to program the EPCQL device via Quartus programmer. You can refer to the AN370 on the steps to generate and program the .jic programming file using SFL method: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an370.pdf (Section 1.6)
You may also checkout on this video tutorial to help you understand further:
https://www.youtube.com/watch?v=dPSFCGNQOCU
I hope the above materials provided are informative and kindly let me know if you have any inputs from your end.
Thank you.
Regards,
Kelly