With the release of Patch 12.0.1, Legacy Loot Mode is enabled in Dragonflight Raids and Dungeons. This makes it easier for players to farm transmogs and other drops from the dungeons and raids of said expansion.
EDIT (11/02, 10:20 PM CET): Added two more items of interest to the farming list.
What are Legacy Loot Rules?
Legacy Loot Rules are automatically applied to raids from two or more expansions past the most current expansion. In Legacy Mode, players have substantially increased damage done and reduced damage taken, making bosses easier to solo.
In addition to this, bosses killed in Legacy Mode will drop a full group’s worth of loot, even when solo. Legacy Loot Rules also lifts any loot restrictions, allowing players to farm transmogs from any weapon and armor type, even if playing on a class that currently cannot equip them. This makes farming transmogs across multiple classes much easier.
It is worth noting that although Legacy Loot Mode is enabled for Dragonflight dungeons and raids, some fights might still be challenging solos while at Level 80.
Interesting Dragonflight Items To Farm
Below, we have a list of interesting things to farm in Dragonflight content. Be mindful that most of the time, further adjustments might be required to make raids/dungeons soloable, due to the nature of certain mechanics when going solo.
- Two mounts from Tattukiaka, the Ottuk Vendor in Iskaara, require jewelry from Dragonflight Dungeons and raids.
- The
Ivory Trader’s Ottuk requires three jewelry items from Dragonflight dungeons:
Thunderous Downburst Ring from The Nokhud Offensive.
Unstable Arcane Loop from The Azure Vault.
Platinum Star Band from Alge’thar Academy.
- The
Iskaara Trader’s Ottuk requires two jewelry items from the Vault of the Incarnates raid:
Terros’s Captive Core from Terros.
Eye of the Vengeful Hurricane from Dathea.
- Chrono-Lord Deios in Dawn of the Infinite for Quantum tokens such as
Reins of the Quantum Courser and 
Quantum Headpiece. Quantum tokens unlock a random mount or transmog item that you currently do not have in your collection. - Raszageth in Vault of the Incarnates for
Renewed Proto-Drake: Embodiment of the Storm-Eater. - Sarkareth in Aberrus, the Shadow Crucible for
Cracked Titan Gem and 
Highland Drake: Embodiment of the Hellforged. - Larodar in Amirdrassil, the Dream’s Hope for
Hearthstone of the Flame. - Fyrakk in Amirdrassil, the Dream’s Hope for
Reins of Anu’relos, Flame’s Guidance, 
Fyr’alath the Dreamrender, and Renewed Proto-Drake: Embodiment of the Blazing.