Played some Harpoon, the older series that Command: Modern Operations came from (long story: https://retroviator.com/harpoon/).

Then I got hooked on Rule the Waves recently. Matrix games publishes the latest game in that series as well (from last year): https://www.matrixgames.com/game/rule-the-waves-3

It is a game mostly about staring at a spreadsheet, showing all the ships in your (usually early 20th century) fleet and their most important data, plus the current budget for your navy. There is ship-design and fighting (2D) real-time battles as well, but mostly staring at a spreadsheet.