What does Gathering Materials reward?

No reward has been recorded for Gathering Materials yet.

Where does Gathering Materials start?

Anastasia Hartwell in Undercity offers it.

The quest log lists it at level 15.

No. The quest exists in Classic Era as well.

World of Warcraft: Forever · quest · level 15

A level 15 quest in World of Warcraft: Forever, offered by Anastasia Hartwell in Undercity. Recorded by 2 players running the addon.

Pay shows once a player with the addon opens the quest.

No reward item has been recorded for this quest. The offer window fills this in when a player with the addon opens it.

What does Gathering Materials reward?: No reward has been recorded for Gathering Materials yet.
Where does Gathering Materials start?: Anastasia Hartwell in Undercity offers it.
What level is Gathering Materials?: The quest log lists it at level 15.
Is Gathering Materials new in WoW Forever?: No. The quest exists in Classic Era as well.

What sells at this level, and what to keep from these rewards, is in the level 10 to 20 gold guide.

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