Sharing is by agreement only. They say, to ensure the sustainability of peer-reviewed research, you may only post the pre-proof as well as accepted manuscript in your institutional repository and make it public (ResearchGate or Academia.edu...)after an embargo period. The embargo period is around 24 months. For more: https://www.elsevier.com/about/policies/sharing

For general considerations, see these discussions:

https://www.researchgate.net/post/Is-it-always-advisable-to-upload-a-Preprint

https://www.researchgate.net/post/What-are-the-disadvantages-of-preprints-upload

https://www.researchgate.net/post/When_is_the_appropriate_moment_to_upload_a_preprint

https://www.researchgate.net/post/Is_Preprint_of_research_articles_safe

Thanks @wolfgang for feedback. I am not sure pre- prints and proof read copies are same. Respectfully i am not sure the discussion of preprints might not be applicable in this case

Thanks @Yves for the feedback