if someone uses the Help action on an enemy and that enemy moves outside 5 feet, do allies still get advantage on attacks?

Since you can Help, then move away and the Help action still works,

Would the opposite also be true? So if someone were to use the Help action on an enemy creature, and that creature were to move away, would the next attack on the creature still have advantage? Heck, would the OA from another ally within 5 ft of it have advantage as the creature moves away?

Do you take falling damage after a high jump of over 10 feet?

I have a multiclass Monk / Druid (2 levels of monk). He cast jump on himself, wild shaped into a brown bear, activated step of the wind, then took a high jump with a height of 42′:

High Jump

When you make a high jump, you leap into the air a number of feet equal to 3 + your Strength modifier

Strength mod is +4 from the brown bear, so 7 × 3 (jump spell) × 2 (step of the wind) = 42.

Our group got into an argument over whether he would take 4d6 falling damage after his high jump, and the PHB doesn’t seem to answer this.

Can a familiar use the Help action on an ally within 5 feet without being within 5 feet of the enemy the ally is attacking?

I was looking at the thing a familiar could do in combat and found the Help action.

The description of the Help action is as follows:

You can lend your aid to another creature in the completion of a task. When you take the Help action, the creature you aid gains advantage on the next ability check it makes to perform the task you are helping with, provided that it makes the check before the start of your next turn.

Alternatively, you can aid a friendly creature in attacking a creature within 5 feet of you. You feint, distract the target, or in some other way team up to make your ally’s attack more effective. If your ally attacks the target before your next turn, the first attack roll is made with advantage.

As I see it the following could be possible:

  1. I, my familiar, and an enemy are standing in a line so that I am standing between my familiar and the enemy.
  2. My familiar can use the Help action on me to give me advantage while standing 5 feet from me and 10 feet from the enemy.
  3. The enemy can not hit (without ranged attack or reach) my familiar.

This seems strange to me as there are a lot of people saying that a non-owl familiar is very vulnerable when using the Help action as they would be in range of the enemy, but in the situation that I just described it seems that my familiar seems safe.

Am I missing something here or is this totally possible?