How easy and expensive would it be to swap this with US English?

On the T14 (not T14s) it is easy. See https://support.lenovo.com/us/en/videos/nvid500443-replacing-your-keyboard-thinkpad-t14-and-p14s-gen-1-and-2-customer-self-service
Seems to be available from ~30USD https://www.amazon.com/Replacement-Keyboard-5N20V44072-5N20V43774-5N20X68864/dp/B0B3RV3LK5
ifixit has genuine parts for ~75USD https://www.ifixit.com/products/5n20v44072-lenovo-laptop-keyboard-genuine

I really hope that day never comes. I dont trust Meta one bit and refuse to use their ecosystem of services. Care to link the mentioned articles?

Only thing I dislike about the T14s is that you have to dissassemble everything to replace the keyboard. On the T14 it’s so much easier.

A refurbished Lenovo T14 or T16 should do it.

As a result I imagine more users will look at other offerings such as Jellyfin.
https://github.com/jellyfin/jellyfin
https://jellyfin.org/