What does Astral Knot Garment reward?

Astral Knot Garment gives a choice of Astral Knot Robe, Astral Knot Blouse, 2,100 experience.

Where does Astral Knot Garment start?

It was picked up in Stormwind City.

Its level has not been recorded yet; it shows once a player accepts it with the addon running.

No. The quest exists in Classic Era as well.

World of Warcraft: Forever · quest

A quest in World of Warcraft: Forever in Stormwind City and turned in to Wynne Larson. Recorded by 2 players running the addon.

Level, giver and objectives show once a player with the addon accepts the quest.

Item	Given	Item level	Vendor sell
Astral Knot Robe	as a choice	31	19s 38c
Astral Knot Blouse	as a choice	31	20s 71c

What does Astral Knot Garment reward?: Astral Knot Garment gives a choice of Astral Knot Robe, Astral Knot Blouse, 2,100 experience.
Where does Astral Knot Garment start?: It was picked up in Stormwind City.
What level is Astral Knot Garment?: Its level has not been recorded yet; it shows once a player accepts it with the addon running.
Is Astral Knot Garment new in WoW Forever?: No. The quest exists in Classic Era as well.

Source: what players running the addon saw in the quest windows; the quest text itself stays in the game. Every quest seen · Stormwind City