Unlike the NCS500/5500/5700 product lines, the NCS 5000 does not have an EVPN section in its L2VPN Config Guide. In cases like this, follow the maxim: if it is not documented for the platform, it is not supported by the platform.
Note that the 500/5500/5700 are based on Broadcom's StrataDNX line of NPUs, while the 5000 is based on the StrataXGS; this might explain differences in supported feature sets.
Disclaimer: I am long in CSCO