I had the same issue with the East Anglia wealth. I was able to find it at dunwic. Alot of people have been experiencing this issue. The wealth in east Anglia is missing as well as wealth in vinland however, most people cant pick thr Vinland wealth up. Have you checked vinland yet?

The new update allowed me to do the altar in euvicscire but for some reason the update spawned wealth opportunities that i already did back into the game. One was in east anglia which i was able to get and the other one is a chest in Vinland at Hvallgrof Outpost. However the chest there wont spawn in. So i came onto the game thinking I would get 100% but no. Ive got another collectible that is bugged