After spending longer than i care to admit poking about this shit, its clear this minigame is locked up tight.
The only thing you can steal back is basically the precious second it takes for your eyes to dart from the bobber to the dial, by centering it. They designed so much of this game around abusing gambling compulsions via rng and such, putting it in the bottom right is clearly a deliberate choice, the center is where the time critical shit goes.
This will grant you a vital moment to adjust your starting position otherwise spent moving your eyes, or it won't help at all.
Usage is the same as always, add it to your Fallout76Custom.ini with the rest of your mods, obviously its going to clash with anything else using FishingMenu.swf. Doesn't have to go at the end of the list thats just hudmenu shit.
https://gofile.io/d/Qes3Jt