I just think that Hazy Moon is such a simple ability that it won't receive an explanation, just like Meliodas's True Magic, which was obviously destruction hax.
I mean, it depends on whether you take the Demon King's words about Meliodas being a source of destruction as an explanation of his power.
But I've seen some people here refuse to acknowledge that Meliodas's power is destruction hax just because it didn't receive an "official explanation".
.
But whatever the case, Lancelot's ability has been shown many times , it's a homing magic.
To add on to this “The Moon Of Eighteen” also wasn’t a homing attack
How do you know that ? , you just don't know what's Lancelot's target with that attack.
Shining Road is an energy blast, so it targets a single enemy, whereas Waning Moon of Destruction is pure light that spreads in all directions, meaning it has multiple targets.
As for Moon of 18, personally, I think Lancelot's target with that attack is their human essence, which bypassed the Chaos protection. That's why they couldn't regenerate, because Hazy Moon has always been a homing magic that targets humans or living beings in general.
My point is , use your imagination to figure out what's Lancelot target with his moon techniques.
I mean, look at Snatch, for example. It's an ability focused on snatching targets, but we just didn't know the full extent of what it could snatch.
Ban can snatch objects but he can also snatch physical strength, even Zero Sign was described as snatching the perception of others.