That depends on whether they're part of the fraud coverup crew or not.

Setting aside recent clown world and obvious anti-conservative bias, you'd think they'd put a few large teams on all the elections where it appears there may have been large-scale voter fraud .... because that is their job afterall. You'd also want to do it quickly, while the evidence is fresh. It's possible (if unlikely) they'd discover that the anomalies were a bunch of nothing, but it's also possible they'd discover it's a wide-scale coordinated fraud.

Obviously, real world is clown world with heavy anti-conservative bias in the FBI, so we're probably better off with them sleeping at the wheel, than interfering and covering up the fraud.