Known. The pictures are painted on the walls of a mud-brick tomb.
The tomb is a mastaba at Dahshur, in northern Egypt. It dates to about 2300 BC, at the end of the Fifth Dynasty and the start of the Sixth. Writing names the owner as Seneb-neb-af, and his wife as Edut. He worked at the royal palace. She held the title of Hathor priest. The pictures show grain being cut, ships on the Nile, a market, and offerings. The page says pictures like these are rare on mastabas at Dahshur. A mastaba has sloping sides, a flat roof, and a shaft down to the burial.
The page does not say what is still argued.
https://www.ancient-origins.net/news-history-archaeology/old-kingdom-mastaba-dahshur-0020542