Yes, the surrogacy agency or the gestational carrier herself will inform the future parents of how the transfer was. IIn some cases, the surrogate may even take a video from the screen where the cannula is inserted and its contents are deposited in the uterus.
Read the full article on: Is it Necessary to be Present at the Embryo Transfer of the Surrogate Mother? ( 61).

Sara Salgado
Embryologist
Degree in Biochemistry and Molecular Biology from the University of the Basque Country (UPV/EHU). Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid (UCM). Certificate of University Expert in Genetic Diagnosis Techniques from the University of Valencia (UV).