Earlier quoted context omitted.
In practice, interested parties observe the process. It's relatively party based (where parties have better access). https://www.ncsl.org/research/elections-and-campaigns/polici... It's relatively difficult to pull off hoodwink when you've got adversarial observers standing there.
There are cases in court right alleging this was not allowed to happen. "The Trump campaign said it is calling for a temporary halt in the counting in Michigan and Pennsylvania until it is given “meaningful” access in numerous locations and allowed to review ballots that already have been opened and processed." - https://apnews.com/article/donald-trump-seeks-voting-stop-25...
https://www.freep.com/story/news/politics/elections/2020/11/...
As was the PA case:
https://pittsburgh.cbslocal.com/2020/11/07/trump-campaign-pa...
Has the Trump campaign taken further action beyond what is discussed in your link?
I know they had a press conference at the Four Seasons in Pennsylvania, did anything come of that?