A southern route from Los Angeles to Bridgehampton would take Interstate 20 through the movie' filming location in Ouachita Parish, Louisiana. However, Lisa would have no reason to be on a two-lane country road unless she was already looking for something off the Interstate.
You do not have a satellite connection with run-off-the-mill smartphones.
A geostationary satellite is cruising at a distance of roughly 22,000 miles from earth and is not called low earth orbit.
A satellite cruising at 15,000 miles distance would have to be faster than the earth's rotation not to fall out of the sky and therefore change position.
At the end of the movie, when Doc Shelby leaves the house to go fishing, he stops on the porch when he discovers that Lisa came back and is kissing with Lucas, he doesn't; close the door of the house behind him. In the next shot, when he leaves the porch, the front door of the house is closed.
While at the courthouse, a map of Louisiana is shown behind the judge, but the scene takes place in North Carolina.
In the first court scene both of the microphones are not connected to an audio cable but in the second court scene they are both connected.
Promotional materials, including the description on Netflix, say that the movie is set in North Carolina. Lucas says that the lawsuit over the cross is in Buncombe County Superior Court, which would be in North Carolina. However, the film repeatedly indicates that it is set in Louisiana. Lisa is shown leaving Texas, she tells Steve she is driving into Ouachita Parish, Louisiana, and then she is immediately pulled over. There is a map of Louisiana in the city court. The ACLU lawyer ask Lucas, "Is your cocounsel admitted to the Louisiana bar?", And the Louisiana state seal is on the wall behind the judge. When Lucas is in the restaurant and pulls the deed out of the envelope, the seal shows it is registered in Ouachita Parish, Louisiana.
During a scene where Officer Lester Toole sets up a place for Dr. Leland to stay in one of the towns jail cells you can clearly see that the name tag on his police uniform has no name on it.