A completely meaningless and symbolic gesture. I don't think Putin is in a hurry to surrender himself to the ICC, and nobody is going to arrest him overseas, because as a head of state he has a total diplomatic immunity. Full disclosure: I'm fully in support of Ukraine in this Russian-expansionist war. However this is just a cold hard fact. Me pointing it out in no way whatsoever even suggests that I'm pro-russian. W…
> he has a total diplomatic immunity He doesn't, because he committed war crimes. Simple as.
His diplomatic immunity will lapse once he's no longer the head of state however.
EDIT: Pretty sure that they are personas-non-grata in each other's country at this point, which is a specifically described scenario in the Vienna Convention on Diplomatic Relations.
So no, of course Zelensky couldn't enter Russia and expect nothing to happen. An Putin couldn't enter Ukraine with the expectation that his immunity will hold.
But both of them could enter any 3rd country with a reasonable expectation of that.