Not exactly the same since it's romance and slightly supernatural, but give Red River (Anatolia Story) a try. It's an older Manga but just as good or even better than this one.
That was one of my firsts and still a very good read
Okie! Thanks for the help
not really nation building but basically the same setting. a chef got teleported back in time and became Nobunaga's personal chef and he uses his cooking for political reasons. highly recommend. it's even better than this one lowkey
https://www.mangago.me/read-manga/nobunaga_no_chef/
Two in my same vibe list (korea)
Any recommendations like this story? Basically nation building stories