How to modify the IBIS model under quartus for board signal simulation

If you have started your FPGA design and have created custom I/O assignments, you can use the Intel Quartus Prime IBIS Writer to create custom IBIS models to accurately reflect your assignments.

Reference: Generate Custom IBIS Models with the IBIS Writer

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug-qpp-pcb.pdf#page=12

You can Setting Up the Package RLC Values in IBIS in the link below:

https://www.intel.com/content/www/us/en/programmable/support/support-resources/download/board-layout-test/ibis/ibs-instructions.html