“allocation of the percentage of a vote”
It would be quite possible to detect that at the precinct level.
At the higher level, it would be easy to enter in false data from a location in the state, but parties surely cross-check statewide and precinct counts.
Election fraud is a mainly a people problem enabled by weak system checks such as:
1. not cleansing voting rolls
2. not checking for double same day voting in different states
3. mailing ballots out without fairly recent requests by the intended recipients
And when anyone makes a move to audit or verify such things, they are met with a Dominion/Gobernment $hitshorm of litigation, criminal investigations and court closures.
When an audit is met with Iwo Jima style resistance, that tells you all you need to know.