I think I have to be misunderstanding you? How is this true?
Outside the Forgotten Realms adventures:
1. Curse of Strahd
2. Witchlight (dang title is too long)
3. 3 quarters of Baldur's Gate: Descent into Avernus with the FR content being tacked on because of BG3.
4. Most of Yawning Portal
5. Ghosts of Saltmarsh
So that's like 5 adventures that partly or completely outside the Forgotten Realms
The only adventure to take place in FR outside the Swordcoast and its part of the Underdark was Tomb of Anniliation and 1 part of Stories of the Yawning Portal.
For Swordcoast adventures there is
1. Frostmaiden Swordcoast
2. Tiamat adventures Swordcoast
3. Storm Giants Thunder, Swordcoast
4. The first part of BG: DiA Swordcoast
5. Waterdeep: Dragon Heist Swordcoast
6. WaterDeep: Dungeon of the Mad Mage Sword Coast
7. Elemental Evil Swordcoast
8. The one with Demon lords, forgot the name, Swordcoasts Underdark.
There is a very, very good risen why frustrated Forgotten Realms fans created the Remembered Realms (Swordcoast) vs Forgotten Realms (the rest of Faerun and beyond) Meme.
Honestly it's disgraceful we have to wait till 2024 to rectify this for the most profitable setting.