I cam across this by chance and thought it might be a bit cheesy, ie not a difficult watch with a bit of history thrown in.
But have found it quite watchable and some nod towards life isn't always nice.
Turns out the Guardian thinks it should have had more attention
Before Oppenheimer, there was Manhattan: this underrated drama is a must-see
Most of the characters are not real but loosely drawn from real-world counterparts; the only two actual scientists to pop up in the show are J Robert Oppenheimer and Niels Bohr. General Groves, played by Matt Damon in Oppenheimer, is only sometimes referenced.
Manhattan instead tells the story of life on “the hill”: those working and living in the secretive Los Alamos compound. It’s a rich tapestry of the triumphs and failures of the teams charged with creating a superweapon to stop the deranged dictator laying waste to Europe.
https://www.theguardian.com/culture/2023/aug/09/tv-series-like-oppenheimer-manhattan-where-to-watch-stan
Watch online or catch up
https://uktvplay.co.uk/shows/manhattan/watch-online
https://pluto.tv/en/on-demand/series/65116b13a61c2a001b4d115e/details