If someone was bored enough they could go find the most popular posts from the election cycle and create a list of people pushing what agenda and then track how many of those accounts are suddenly inactive today.
Comment and post history are basic functions of the platform. Everything you post is linked to your account. No one is wrong for sorting through that data.
I have used the post history a grand total of zero times because I literally don't care about your post history. It's a social network, these people come and go, not the party committee meeting to see who to use as a scapegoat for our failures, today.
I'm not sure what point you're trying to make here. What is a software that you use 100% of its features? I don't use the direct messaging feature, so no one else should either. I don't post pictures as posts so no one else should. Lemmy isn't hiding the fact that everything you post is tied to your account. If that's unacceptable then don't use it.
If a list were to be generated of a bunch of accounts that stopped posting as of November 5th, one could look at the post history of said accounts and reasonably infer if they were bots.
Being of Russian (specifically) origin would be a bit more difficult but also somewhat irrelevant at this point too.