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I don't think so, you need something like Place Everywhere to build outside the boundaries, but that requires F4SE to run which is not possible on console.
There are mods with a bridge built, maybe you could DM the author and ask them to port it to xbox.
Update:
I just built two bridges to spectacle island one from warrick withwtwo mods and the other from the castle with one mod again these are not Sim mods but they might help builders
#1. (xb1)build anywhere (used only for castle bridge)
36.03 kb
MA: tim-timman
#2. Conquest-build new settlements and camping
1.52mb
MA: chesko
I used a combination of both on the warrick bridge.
I got these off beth.net for xb1
I found a save bug using the mod build anywhere on xb1. The way I found around it is to disable not delete the mod and everything is will stay that you built and saves will work fine just reenable to use again.