The Economist doesn't hide their ideology and advocacy.

Unlike many "well renowned sources" (ahem... NYT)

What would you think the ideology of the Economist is and where in their website do you get that from? Just asking for the sake of argument.

They routinely repeat that their editorial policy is liberal. Straight up in the articles they publish, they note that.

I listen to their articles and they often repeat this.

Literally typing this into Google would have provided you with the link to their website.

https://www.economist.com/news/2020/06/19/frequently-asked-q...

From that webpage, they say that their bias is between classical liberalism and centrism.

Now, what is a classically liberal bias, concretely, as far as international affairs are concerned?

Free trade and non-interventionism.

Then you're already misjudging the bias, the Economist supported interventionist in Syria, Libya, Iraq, and even soft intervention in Bolivia. It's as interventionist as most.

As far as free trade, that's difficult to apply to most situations.

Socially liberal, fiscally conservative. And VERY much pro status quo.