Can’t look at post history of my previous now-closed account?

Hi there, I wanted to look at the post statistics and history on my previous-to-this-account and I can’t seem to do that. I was also curious about my join date on that account but that information was also not available.

I had noticed all of the above for another closed account unrelated to me but I assumed that that former user requested to have all that information erased on account closure.

Is this a policy with all closed accounts now, that posting statistics, history and join date and probably a few other things are cleared now? I know that I used to be able to access that stuff on my old account profile if I wanted to, even after I closed it. Shouldn’t that clearance be on request or is that just too technically time-consuming or maybe impossible? That would be understandable. I can find posts on my old account on threads I know I took part in, so my posts on that account haven’t been deleted but there’s no page where they are neatly collated now that I can see.