I'm not sure if this is the right area, and I haven't done too much research on the mods aspect of the Xbox One and Stardew Valley, but when I see how great some mods are for the game (especially with marriage candidates) on PC it makes me sad that consoles can't participate. Please bring the mod function to Stardew Valley on Xbox One!
As far as i know about xbox, you need to crack the console to install mods for any game. ( I MAY BE WRONG )
Some console games do have official mod support nowadays, Fallout 4 to name one. But considering SDV doens't even have official mods support on PC to the extent that Starbound or most of Bethesda's stuff does, I don't think we'll be seeing something like that any time soon.