Requesting help in FeynCalc related evaluations

[leothestark]

Issue:
I am using Mathematica 13 and FeynCalc 10. I wanted to use the Dirac matrices anticommutator trick to simplify the Dirac matrices. I looked up one of the forums where @vsht has replied regarding the same issue. The solution was to use "{DiracCanonical -> True}". I used that but I am not getting the expected results.

[vsht]

It's called DiracOrder->True is FeynCalc 10.