How many pieces of gear drop in Shadowlands M+ and raid at the end?

I’ve read varying reports about gear drop amounts in raid. Someone said it’s 3 per boss. Others said it’s more. What about M+? I’ve read 1 piece per run and then 2 elsewhere. Any hard data?

Mythic raid will drop 3 pieces of gear per boss and mythic + will drop 1 plus an additional for timing per wowhead. Links below:

https://www.wowhead.com/news=319244/mythic-castle-nathria-in-shadowlands-will-drop-3-pieces-of-loot-per-boss#:~:text=In%20our%20exclusive%20interview%2C%20Game,pieces%20of%20loot%20per%20boss.&text=Ion%20Hazzikostas%20has%20revealed%20in,drop%203%20pieces%20of%20loot.

https://www.wowhead.com/guides/shadowlands-season-1-mythic-dungeon-guide-affix-changes#end-of-dungeon-loot

I think at +16 keys will start increasing the chance of an additional piece end-of-dungeon, timed or not.