How do I increase player reach?

I am currently making a mod where the player can craft an upgraded beacon with new effects.

One of the new effects I want to make is to extend player reach by 3 blocks, so they can place and mine blocks father away to make budling easier for large end game projects.

From what I've researched so far it has to be custom code and I am completely fine with that but all the tutorials are multiple years old and they explain how to only apply extra range to specific tools.

(I am specifically trying to increase the players global range with a "potion" effect applied from my upgraded beacon. not have extra range be applied to a specific tool.)