Definition: REACH Annex II requires that a safety data sheet is prepared by a competent person who has appropriate training and knowledge of the hazards and the legal requirements.
The law does not define a diploma. The supplier decides who is competent and should be able to show training records and refresher courses.
Software can do the calculations and wording, but a competent person should review and release the final SDS.
REACH Annex II, point 0.2.3 requires the supplier to ensure that competent persons receive appropriate training, including refresher training.