Works great with tomatoes, less great with peppers (both nightshade family)
I tried that with a few clones in rockwool once....had endless problems with the 50% that survived.
I figured that if you could root from a cutting you should get new roots if buried deep.....did not work for me.
Personally, I don't expect to ever do that again.
Just my experience....
an old gardener
The answer is yes, roots will grow on earthed stems. Ive seen number accounts of people's seedlings stretching too big and their solution was to bury the stem to shorten the hight and in return, that buried stem grows roots on them.