About those “rockets” being photographed across Ukraine, my understanding from some of the tweets is that these are the rocket booster stage of the rocket, that disengages from the warhead. I think these are from the Grad?
A quick google didn’t help me.
Any Lizard have a better insight?

Another haunting image out of Kharkiv. A rocket embedded in a children’s playground. pic.twitter.com/HOH2m3bU3V

— Michael Weiss 🌻 (@michaeldweiss) February 28, 2022