Lost & Found is a daily quest in Assassin’s Creed Origins. You can get a different one every day, from Reda, the child merchant running the Nomad’s Bazaar. This variant requires you to find a missing shipment of weapons. When you do, you’re rewarded with experience points and a random item. However, a lot of players are complaining about bugs in the quest, going from missing or misplaced markers, to not being able to get the mission at all. There’s no way around most of these issues – you’ll have to wait a day and hope tomorrow’s version is working as intended.
It seems like people are getting sent to different locations, depending on their character’s level. A number of those who’ve got Giza as their destination aren’t able to complete the quest, as the marker shows a location that’s underground and seems inaccessible. You could try checking the secret tomb under the Great Sphinx, but it’s a long shot.
Others have reported not getting the objective marker at all. After checking the entire map, area by area, they couldn’t find the place they were supposed to look for the shipment in. Zooming out as much as possible might help in this instance, as it gives a better overview, hiding much of the other map icons.
There are also those who can’t even get the daily quest. It’s still unclear whether the “daily” refers to in-game days, or real days. If it’s the latter, there’s no telling when a new day starts. If you’re having this issue, make sure it’s been more than twenty four hours since you last played a daily quest. Give it a few hours, then talk to Reda again. A handful of player have even said they’re being spammed with these quests, getting one as soon as they finish another. As you can see, there are plenty of bugs to deal with here, so it’s best to skip these for the time being.