Agree with Serg_K. I have the Cybrei Meta aero chainrings, and they’re a smidge lighter than the Cybrei aluminum ones nothing in it! But honestly, theres no difference in performance. I bought them because they just look better aesthetically, on the Cybrei crank. I could have used my DA 54/40 but i wanted a 38 to see how it was with the 11-34 casette for climbing.
There is nothing else out their that i now of but Carbon Ti.
Gemini are developing 2X rings like there 1x Ridgel gravel rings but there obviously will not be cheap and cheerful!