Better offhand slot in Minecraft Bedrock

I know that the reason you didnt add a java-like offhand slot for Minecraft bedrock is because it wouldn't make sense on mobile, but, i think you could simply add a "left click" toggle on the screen, so the player would use the item on the left hand or attack with the item in the left hand, and being possible to be disabled in the options if the user doesn't like two more toggles on the screen