Off hand use on bedrock

I play on a standard Ps5 controller, I have every button bound to something and still have the up on d-pad left/square I alternate between using the two buttons for "pick up block" and I noticed that you can put fireworks in your off hand and cannot use them with the elytra, why not allow people to bind a "use off hand button", which in my case would be up on d-pad or square. Blocks and items would work as they would using L2/left trigger in the main hand, axes would strip wood, shovels would make grass a path block, blocks would place, fireworks would be able to place and be usable with the elytra