Remap key combos to symbol characters

For my home workstation I use a Moonlander which lets you add different layer-shifting to any key, and define each of the layers with whatever character desired. For example, I'd have a symbols layer triggered by holding the "f" key. From there, The "j" key would produce the "(" character, k would produce the ")" character, etc. I realize that's the firmware on the keyboard doing the work there, but is there any way to get this type of custom behavior on the base laptop keyboard?