Supply Chain Transparency is an important topic in many companies' sustainability and business & human rights efforts.

For example, the United Nations Guiding Principles for Business & Human Rights and some related legislation like the California Transparency in Supply Chains Act, or the UK Modern Slavery Act require larger companies to disclose how they prevent/deal with Forced Labor in the Supply Chain. Transparency about your supply chain is generally considered best practice.

There are many other examples of proactive companies, like Marks & Spencers interactive world map of suppliers [1], Adidas Global Factory List (xlsx) [2], Unilever's list of palm oil suppliers [3], ...

[1] - https://interactivemap.marksandspencer.com/

[2] - https://www.adidas-group.com/en/sustainability/compliance/su...

[3] - https://www.unilever.com/Images/unilever-palm-oil-supplier-l...