No, I don't have details on any Russian semi-permanent military presence. I know that a point of contention between Russia and Belarus over the years has been the establishment of a military base in Belarus, and you've seen Alexander Lukashenko publicly make comments about it that weren't welcomed by Russia. In early September we saw a gathering of the Russian national guard and law enforcement near the Russian-Belarusian border. It was called back after the meeting between President Putin and Lukashenko on September 14, where those were withdrawn. They weren't in Belarus proper, though. That's the information I have.
On November 5th, 2020. See this statement in context.