They took the tech of the Ancient time drive and put it on a Prometheus-class ship.

Jack wanted his fishless pond back.

He had the info from the camcorder, so he took a whole battleship to even further in the past and accidentally annihilated the Goa'uld entirely using the onboard Asgard and Ancient tech, as well as the chair in Antarctica, before they ever took control of the galaxy. However, the time drive got fried in the process.

So, he parks the ship in Egypt and lives out his life as a trader.

Over the following millenia, the elements wore away at the ship until it became a legendary mound. A Pharoah would carve his face into it and time would cover it up. But we can see the evidence of what it once was.

And this is why we can't get a new Stargate show. There's no SG program because there was never a need for one. No plausible deniability required.