Isn’t this the important bit? IIRC this can be demanded by anyone. If it passes by a voice vote, assume your representative voted yay or abstain.
You can see a lot of difference in the way congresspeople talk based on whether it’s televised or not as well, especially in committees.
I’m just a little surprised that voice votes haven’t been replaced by some kind of digital process. A voice vote doesn’t save time compare to a modern method of tallying votes. Why avoid making records when records are so “cheap” these days?