You've dismissed an insightful comment.
It's apparently not exactly clear what 1922 theory he's referring to, but we certainly didn't just take something from 1922 and use it today as is.
There's general relativity, which we keep trying to poke holes in, the idea of the big bang itself, which dates to the 40s, dark matter, from ~1930s, refined and tested in a lot of different ways since then, dark energy from 1998, inflation in the 1970s, and a bunch of other things.
If you want to point to a single theory underlying modern cosmology that's existed approximately unchanged for a long time, it's general relativity.