There are Few integrals which failed due to SageMath not able to translate the result back to SageMath syntax and not because these CAS system were not able to do the integrations.
These will fail With error Exception raised: NotImplementedError
The number of such cases seems to be very small. About 1 or 2 percent of all integrals.
Hopefully the next version of SageMath will have complete translation of FriCAS and XCAS syntax and I will re-run all the tests again when this happens.