It looks like some lawsuits are gearing up. Remember, usually a campaign has to convince a court of election irregularities in order for a hearing to proceed.
1. Michigan: Over night Trump's vote total stayed the same while Joe's increased by 200,000. This is statistically impossible.
2. At least AZ and NV: Poll access by Repub poll watchers were limited. In NV they even stopped voting when NV's total count became important for the election. The Repubs will seek recounts here with adequate Repub poll watchers.
3. WI: Repubs will seek a recount as the numbers of total voters is highly suspect. I believe this also applies to individual counties in other states. Milwaukee has 7 precincts with more votes than registered voters. And WI as a whole had just under a 90% voter turnout rate. A statistical impossibility.
IOW, don't expect an election result for weeks as these cases make it through the courts.