"Political" is a poorly used term, and what people mean to say is "propaganda". "Everything is political", but not everything is propaganda. For example Prison Architect is based around prisons, which itself is extremely political, but the game isn't overt propaganda since the game is largely apathetic about how you handle your prison. It doesn't comment on the prison industrial complex or privatized prisons outside of the game mechanics, which are loose enough for it not to feel like you're being forced to behave a certain way. The developers have stated that the game is not based in any specific country.
An example of possible "propaganda through mechanics" is Democracy 3 which is rather unbalanced unless you engage in socialism. This of course is not a real economic simulation and purely balanced around the developers own feelings. The developer has been asked if he tried any of the rebalancing mods available, and he said he hasn't, and he doesn't seem interested in re-balancing the game as to avoid one economic policy system being obviously OP.
Journalists often demand games become "more political", but what they actually mean is they want games to comment and push forward an opinion (propaganda) on current ongoing events. You saw this with journalists and The Division, where Ubisoft came out and said their game has absolutely nothing to do with the Trump administration. The result of this refusal to use their game as anti-Trump propaganda sent the gamejournos into a rage about how Ubisoft was "scared of being political". Despite this you could definitely argue The Division 2's storyline is political (because everything is political), but it's fictional politics.
The same journalists are praising Dying Light 2 because the developers are saying "oh yes our game is very political", but it's unclear what that means. I'm curious to see, it doesn't look like it's really trying to be propaganda beyond having a multi-faction story that roughly equates to "do you join the anarchists or the establishment?". I find it hard to make that into propaganda, since a post-apocalyptic zombie-infested fortress city is very much in the realm of fiction. I suspect journalists will be disappointed.