Hi,
if you meant standard/extended IDs, then yes, FlexCAN supports both.
If you are interested in extended data in CAN FD frame, then no, MPC5777C's FlexCAN does not support CAN FD, just a MCAN module support this.
Links to MPC5777C FlexCAN and MCAN examples are available on https://community.nxp.com/docs/DOC-329623
BR, Petr