UEFA are really questioning where a sponsor is getting their funds from to pay for sponsorship of a football club. Only, it isn't really any of their business and if they think it is, why are all other sponsors within the game not subjected to the same scrutiny?
Without descending the Harris levels of "whataboutery" Do UEFA care about the fact that one of its main line sponsors received billions of state funding to prop itself up and that the state that did so has clubs competing in UEFA competitions? No of course that's absolutely fine and there's no potential conflict of interest there. Er but actually weren't the FPP regulations changed to facilitate AC Milan's change of ownership and allow investment shortly after UEFA renewed its sponsorship agreement with Milan based Unicredit which had been propped up to the tune of 8.1bn euros by the Italian state. That's just pure coincidence I am sure.
Lots of sources are behind paywalls but a couple of open ones:
https://fr.uefa.com/insideuefa/about-uefa/administration/marketing/news/newsid=2253825.html
https://www.irishtimes.com/business...es-on-to-unicredit-s-13bn-cash-call-1.2934743