No, BC4 is not supported in Arria® 10 External Memory Interface IP for both the hard memory controller and PHY-only configurations.
Device Family: Intel® Arria® 10
Intel Software: Quartus Prime
Last Modified: April 13, 2017
Version Found: v15.1
Version Fixed: v15.1
Bug ID: FB: 447847;
IP: Arria 10 External Memory Interfaces