Looks like EA did open source the game (only the first maybe)

https://github.com/electronicarts/CnC_Red_Alert

This seems to be the most active port saying it works on a Mac/Linux https://github.com/Daft-Freak/CnC_and_Red_Alert

You can always play it in the browser https://news.ycombinator.com/item?id=45991853, sadly no Yuri's Revenge is possible there though

they lost the original assets so afaik they arent gonna make a remaster

cnc-ddraw i think would get it to run fine on a steam deck though, so you should be able to play it without much issue