Hi @fsoprano and sorry for being a bit late here 
You can find these metrics mostly in the meshing log. Example:
Area Max: 0.0103596, Min: 0.00124498, Avg: 0.00792313
Aspect ratio Max: 4.52281, Min: 1.00607, Avg: 1.73893
Skew Max: 1.96653e-13, Min: 1.53781e-16, Avg: 2.54492e-14
Scaled Jacobian Max: 1, Min: 0.866025, Avg: 0.973205
Condition Max: 3.98479, Min: 1.00007, Avg: 1.60139
Volume Element Quality Metrics
Volume Max: 2.45601e-05, Min: 3.21901e-06, Avg: 9.329984444444444e-06
Aspect ratio Max: 10.1797, Min: 3.029, Avg: 4.317882962962963
Scaled Jacobian Max: 0.198564, Min: 0.059874, Avg: 0.1058477037037037
You can additionally check the mesh quality offline by using Paraview. For the tet-mesh it is recommended to avoid sharp angles. You can improve your mesh by adding more tetrahedrals to further discretize the mesh and bring the angles closer to an ideal 60° (equilateral triangle).
Cheers!
Jousef