I was also surprised, first time making it myself.

It's mostly street food here in Korea. Which tends to be very easy to make, yes.

Sort of. They are more chewy and a bit harder and form-keeping. They also, I feel, absorb less sauce. Main difference is gnocchi are potatoes and eggs, tteok are rice flour, so the taste is clearly different.

I found them at my local grocery store, frozen.

It's actually pretty simple to make them if you can find short grain rice flour (Mepssalgaru). It'll be in the freezer section of your local asian grocery.

https://www.maangchi.com/recipe/garaetteok

It’s like a big soft noodle, but rather than chewy/bouncy it’s more gummy. It’s very nice though because unlike gummy noodles, it’s a completely smooth consistency (gummy noodles tend to be gritty and inconsistent).

Can send you the raw image file if you want :)

It's real slop and real fucking delicious. So glad South Korean cuisine has taken off where I live.