the majority of the ballots left in nevada are from clark and washoe county, which contain the only two real cities in nevada. nevada's mail-in ballot scheme was to give every voter in the entire state a mail-in ballot automatically, you didn't even have to request it. if nevada is counting mail-in ballots last, then it is extremely likely that the majority of them will be democrat and joe biden will sneak out a victory in nevada. biden is up 7 and 4 points for clark and washoe respectively, so yeah nevada is basically guaranteed to be a biden victory imo
only state i know anything about bc i used to live there lol