General Discussion

1) nope
2) state recounts are typically triggered by state law when a margin is razor thin, like 0.5% or less. Otherwise, candidates have to foot the bill.
3) possibly, but only in their own states
4) possibly, but only on a race by race basis if someone who has standing files suit and their lawyer is willing to risk disbarment- remember both lower courts and SCOTUS refused to hear numerous 2020 election denial cases due to either lack of standing or lack of evidence. The few that were heard were dismissed and the lawyers faced legal and professional consequences.