Quests handed in at level 60 in WoW Forever no longer turn their experience into gold, and Blizzard says it is on purpose. On November 10 at 21:56 UTC, Kaivax explained why, and announced a hotfix that adds gold to most quests of level 48 and higher, expected "in the next 24 hours or so". The hotfix is live: Blizzard's notes of its hotfixes of November 10, published on November 11 at 03:27 UTC, list it.
Why level 60 quests pay no gold for their experience
In Classic Era, a quest completed at the maximum level converts its experience into gold. Blizzard added that conversion in 2006, in the weeks before The Burning Crusade, to give players gold as they finished the original game, and kept it in Classic Era in 2019. For WoW Forever, it removed it: players kept a full quest log of completed quests to hand in once they reached 60, so the fastest way to level was to grind creatures and not hand in quests at all, "which is not a design we want to retain in WoW: Forever".
The hotfix: gold for quests of level 48 and higher
Blizzard admits the change cut gold income near level 60 more than intended, since only about 25% of the game's quests give gold at all. The coming hotfix "will add additional gold rewards to most quests with a quest level of level 48 or higher, including adding gold to quests above level 48 that never previously rewarded gold at all". It should go live "in the next 24 hours or so". Blizzard has not given the amounts. It went live with the hotfixes of November 10, whose notes add that the change "brings high-level quests in-line with the rest of questing in WoW: Forever, with the goal of giving players a good reason to complete those quests while leveling up to 60 and thereafter". They still give no amounts.