You can’t tell because you’re not putting the work in.
Let’s say you want to audit the result for Arizona.
You go to Arizona’s website and there’s a document that shows the exact result for each county.
Then you ask about, for example, Apache county and there’s a 400 page document that shows the results by individual district.
Auditing stuff is a lot of work, but every single number that added up to a Biden win was audited by a professional and reviewed by observers from both sides of the aisle. If someone falsified the result in Arizona, they have to get those false values into the individual results from these districts that cast 500-1,000 votes.