There are new icons to help identify a few things about materials
The color: green, yellow, red is for the processing time
If a render engine is recommended they have a letter: e for eevee and c for cycles
if the material works in both it will have no letters.
If it needs displacement the icon has dents.
If a material looks flat in Cycles it’s probably because it uses displacement and the object has not enough geometry to displace.
See Materials With Displacement
Or you can try to change the material settings>surface>displacement from Displacement Only to Bump only and see if it looks acceptable.
It may look good enough for small height displacement.