Anyone willing to help me figure out which item mod to use? DND 5e sheet

My character recently got an item the DM homebrewed that gives a +2 to all non-magical attack rolls (which in my characters case would be all attack rolls). What mod/prop would I need to put on the inventory input to get that to reflect in the attacks list on the sheet?

There is no global weapon attack modifier mod for equipment - you'll need to instead enable Global Attack Modifiers on the sheet, and add the modifier there. But, this will apply to all of your attack rolls, so you'll need to uncheck that modifier when making attacks it does not affect. The other option is to add that modifier to every affected attack individually - the "Melee Attacks +n" mod adds the modifier to attacks with the weapon with the mod.