IIRC, the consoles ports of XCOM and Civ were handled by a different company than the Switch version, right? The only reason I brought up Virtuos is because a quick glance at the eShop listing confirms them for Midnight Suns and it's been rumored for a while that they'd be handling Alan Wake Remastered.
Aspyr handled all the console ports for Civ, and they all received the iOS version with modifications. Since iOS was RAM limited it had static leader portraits, whereas Switch received animated portraits same as in PC. Switch appears to be the lead platform actually as it came out a year before the other two and had the controls adopted to a joycon/procontroller first.
As for XCOM 2, because of the delay in porting, Switch was ported by Virtuous, while XBOX/PS4 was ported by another team (not Firaxis) first and that team wasn't involved in the Switch port.
You said it yourself. They run "With decent visuals". None of those ports have resolution/fps graphical feature parity, so comparing them to the original games as a measure of how capable the system is and to somehow suggest that the Switch is punching above its weight makes no sense. The specs pretty much line up with raw specs in the case of the Switch. The same games on PS4/Xbox One push a lot more pixels. To run them on Switch, resolution is paired back and so is framerate in many cases, texture resolution is lower and so is the precision and number of graphical features.
There is nothing magical about the Switch ports you've mentioned. It's simple optimization work. I agree that it's remarkable that games like Doom Eternal or The Witcher 3 are running on the hardware at all, but IMO the compromises to get there are painfully obvious.
Well for starters I didn't say anything about magical about the platform, just that Switch has different bottlenecks and it's not a linear conversion. And it is using a more modern chipset from nvidia, which has a more efficient gpu per flop from the comparative AMD designs on base XBONE/PS4, so even the flop figures are misleading.
A 15 watt console isn't going to have graphical parity with a giant 70+watt brick. The discussion is about getting a high scope game to run at a good fps with good visuals, Switch has plenty of examples. we don't even know if this game is real. Could be an error.
But you're so committed to shitposting and downplaying a game on Switch that doesn't exist yet. I wonder why.