Is it a must to get the final blow on a boss in order for them to drop while partied?

I've heard ppl say yes but all the vids or guides I've seen don't mention this.

Links are appreciated

No, lol. Its 100% RNG. Ive ran dungeons being lazy and not doing much and still got them.

If that's the case, than multiple people woulnd't get drops in the same dungeon. It is just RNG

Lmao clickbait who made videos on that

Big if true