This really isn't shocking.
Snoop has been bricking commercially for over a decade. His albums have largely gone under the radar since his Snoop Lion phase. That's not to say his music is bad as BODR was a pretty solid album but he's been a bigger celebrity than musician for a long while now. Even BODR couldn't make it to the top 100 on Billboard.
As for Dre, he hasn't had a traditional rap release since 2001(the album) and he hasn't been an in demand producer since the mid 2000's. By the time the 2010's came, people knew Detox was a fantasy and Compton was inaccessible to people for a long time due to Tidal. In other words, you had to be a real hip hop or Dre fan to even listen to it. The same casuals who watched the NWA movie likely didn't even know Compton dropped or heard a single song off of it.
So, this sounds about right for both of them. They're legacy acts so you can't expect them to put up big numbers anymore. Nas is an anomaly due to maintaining a strong core fanbase without having to pander to casuals or radio. That's why all the Hit Boy albums minus the ones from 2023 did fine commercially. People actually care about what Nas says whereas Snoop and Dre both use writers and rap about pretty basic/shallow topics so they don't have as strong of a core fanbase.