Welcome to the Internet. There's Western propaganda here, too. We got all kinds.
Lemmy isn't Reddit. It's not owned by one entity. You're not in a bubble that a corporation is going to keep you safe in. Anybody anywhere can create a Lemmy instance. They may be Chinese, they may be European, they may be Russian, it doesn't matter. What matters is using your critical thinking to sort the wheat from the chaff. Join and federate with those you think are good and block those you think are bad.
Practice critical thinking and encourage your friends and family to do the same when they're looking at information online. There's free courses out there that can help with that kind of thing if you're unsure.
But really, that's your only defense because every company wants your attention, every government wants you on their side, and everyone is trying to manipulate you with propaganda somehow. Lemmy is no better or worse than Reddit, Facebook, or Twitter in that regard. That's just the Internet.
The large wind farm off the coast of Aberdeen could power about 70% of the entire city iirc. That was one of the first large offshore windfarms, they'll only get better and more efficient. If large offshore windfarms become more common, then huge swathes of the country will be powered by them.
If we then become reliant on those windfarms (which appears to be part of the long term plan) then putting control of them in foreign hands gives them power over us such as "oops, a cable broke and now your whole city has gone dark, ease off on foreign policy A, or agree to trade agreement B, and we might be able to fix that cable for you"
It's a nationally critical piece of infrastructure, it's strange to source it out of country.
Of course, a UK company could try that kinda stunt as well, but they then need to answer to UK courts. It's less daunting for foreign state run companies as they can pull out of country easier to avoid repurcussions and have the backing of their government.