Oh MN! You made me giggle. I'm glad your Nan is not stalking you!
We took our then 4 and 2.5yos to their step grans funeral. We talked about it a lot. TBH it was over the 2.5 yos head, but it does mean he vaguely remembers it and there has never been a time when he didn't know about death. But even before then DS1 had talked about death because of wildlife we see out and about and he used to want everything explained in great detail.
At kinder the kids were doing 'words starting with' and when we got to 'd' loads of the kids said dead, death etc. one of the mums freaked out, but I think they know more than we think.

There is definitely no 'one size fits all' answer to death and grieving for children.