Yes, it is even mentioned on the web site and it also supports Total Commander plugins (IIRC Ghisler mentioned at some point that he's fine with other file managers adding support for TC plugins since it means there will be more plugins available).

Sadly it feature-wise it is very behind Total Commander, i use TC all day all the time and DC always feels like an unfinished alpha version of TC. It kinda reminds me of Midnight Commander vs FAR Manager with the latter being way more advanced than MC (though Windows only), but even then despite its lack of features MC still feels mature and is what i end up using on Linux despite preferring GUI applications.

Perhaps if i ever decide to switch to Linux as my main OS at some point i'll try to work on Double Commander myself and implement the stuff i'm missing. From what i can see it is written in Free Pascal and Lazarus which are my jam anyway :-P (FWIW the 64bit version of Total Commander is also now compiled using Lazarus so i hope at some point Ghisler releases a Linux version...).