Probably few here with your hardware/display combination
Expect to have to read the Data Sheet https://www.buydisplay.com/download/manual/ERC160160-2_Series_Datasheet.pdf
Check the connectivity you've wired
Check the timing expectations
Check the software
Check ability to read/write register content successfully to confirm data/instructions are being accepted.
Get a scope or logic analyzer, check signalling against expectations.
