You can definitely take measurements using REW (with the right microphone) and use them to compute a PEQ setting specific to the options available for the 976 for each channel. You then enter the settings through the OSD.
The learning curve and time for this process is substantial but I found it really taught me a lot about my room. In the end I was dissapointed with what I could achieve with EQ and instead I shifted attention to speaker/listener placement and acoustic treatments (bass traps, diffusors).
_________________________
Outlaw Audio Model 976 / 7700 / Ultra-X13
B&W CM9, CM Center, DS3 (side), DM303 (back)
Blue Jeans Cables (XLRs, Canare 4S11 Bi-wire, HDMI)
Tivo Bolt, Xbox Series X, Panasonic ub820, AppleTV 4k, LG C765P
Roon, Allo Digione Signature, Sonore MicroRendu, Uptone Audio LPS-1, Peachtree Audio Nova 150
GIK Acoustics Soffit Bass Traps, 244 Panels, Monster Bass Traps, QRD7 / Polyfusor Diffusers