Unity Input modifier that accepts a modifier + a button but the modifier must be pressed before button

ButtonWithOneModifierOrdered.cs

using UnityEngine.InputSystem.Layouts;
using UnityEngine.InputSystem.Utilities;
using UnityEngine.Scripting;
using UnityEngine;
using UnityEngine.InputSystem;

namespace AshInput {
	[Preserve]
	[DisplayStringFormat("1º{modifier}+2º{button}")]
	public class ButtonWithOneModifierOrdered : InputBindingComposite<float> {
		[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)] // BeforeSceneLoad is needed or it will fail in builds initializing too late.
#if UNITY_EDITOR
		[UnityEditor.InitializeOnLoadMethod]
#endif
		static void Init() {
			InputSystem.RegisterBindingComposite<ButtonWithOneModifierOrdered>();
		}

		[InputControl(layout = "Button")] public int modifier;
		[InputControl(layout = "Button")] public int button;

		enum LockedState : byte { Waiting, LockedPressed, LockedUnpressed };
		LockedState lockedState = LockedState.Waiting;

		public override float ReadValue(ref InputBindingCompositeContext context) {
			bool newModifierState = context.ReadValueAsButton(modifier);
			bool newButtonState = context.ReadValueAsButton(button);

			if (lockedState == LockedState.Waiting) {
				if (newButtonState) lockedState = newModifierState ? LockedState.LockedPressed : LockedState.LockedUnpressed;
			}
			else {
				if (!newButtonState) lockedState = LockedState.Waiting;
			}

			return lockedState == LockedState.LockedPressed ? 1 : 0;
		}

		public override float EvaluateMagnitude(ref InputBindingCompositeContext context) {
			return ReadValue(ref context);
		}
	}
}

Just drop the file somewhere in the project and it will appear in the Controls Manager