If your top panel is visible, you should see a total count & progress bar in the upper left when exporting. If you click on that area, you'll get a larger progress bar that also tells you the name of the image currently being exported.
I do not believe Lr displays a remaining count or remaining time anywhere.
Would love to see a "time remaining" feature added to the status bar. As it stands, it's impossible to really know how long anything will take. For example, it would be super helpful for my workflow to know how long I need to leave my computer to export photos, or denoise a bunch of photos, or create 1:1 previews. Even if it was just a ballpark, it would be better than nothing.