I happened to have detailed day-by-day voting and registration data for the 2024 Nevada election as it was happening. Harris losing Nevada was telegraphed in the data almost from the beginning. Forget the top line totals, the underlying structure of where and who was registering and voting in real-time made the outcome all but a foregone conclusion weeks before the actual election. Nevada was some of the easiest money on the prediction markets.
Much is explained by an unusually robust turnout of low-propensity voters for Trump. They often don't care about the rest of the ballot, so it skews results albeit in a predictable way. (This is also the risk for Republicans; they are unlikely to show up for mid-terms and may sit on the sidelines again in four years.)
Nevada has consistently clean election processes. I am only aware of a single anomaly over the last several Federal elections that was clearly inexplicable. It wasn't this election, that instance looked like a system failure rather than fraud, and it didn't change the outcome. Some other States are rife with anomalies that persist even with sophisticated analysis most cycles.
If I was going to pick a State to look for Federal election irregularities, Nevada would be pretty low on my list. It is easy for amateurs to fool themselves into thinking they've found election fraud when really they just don't understand what is required to find a signal that holds up under sophisticated analysis. Same thing happened in 2020.
I also used to live in Nevada and am pretty attuned to the local politics. There are local bellwether statistics that are traditionally pretty reliable for indicating how an election will break. Harris was upside down on these too. The tortured rationalization by Nevada election pundits like Jon Ralston to reinterpret those as "good actually" was uncritically repeated widely in the national media.