It's just too good - We have blamed Russia for using our platforms to elect someone. Now Russia is telling our platforms to block certain content otherwise they will consider it interference. The Cold War never ended did it?
As always there will be tons of misdirection to hide the sources and overstating of the impact of foreign boogiemen for political points and justification of new information controls. It’s a tactic as old as politics.
No, the US have supported and promoted dozens of coups and dictators. The phrase you're looking for is not "pro democracy", it's "aligned with the US interests".
The infrastructure and incentives which drive it have not changed. America was founded and bred on colonialism and foreign dictatorships which enable cheap cost of living at the expense of hellish working conditions in other countries.
After a certain point, simply due to the number of people on your platform, you become someone to be influenced / controlled / watched out for / a target / a friend / an enemy.
And other control brokers, large and small, will try to influence you. (And - to a degree - you can't escape it, you will be influenced. Now you have to counter it, embrace it, ignore it, understand it, downplay it, dodge it, amplify it, etc.)
Size (of potential influence) makes organizations, platforms, people targets, not "gatekeeping".