It's not about a single trusted vendor here, it's about a supply chain on which multiple independent parties are working. The blockchain is kind of a neutral intermediary.

Scenarios like this are not "very strange" but very real. Europe and China are actively working on blockchain projects, e.g. https://ec.europa.eu/cefdigital/wiki/display/CEFDIGITAL/2021... or https://www.reuters.com/world/china/china-selects-pilot-zone...