What is confirmed
Alchemy appears alongside spell crafting in the official description of the current Early Access build. It is already presented as a working, fully featured system.
The full-release plan names alchemy as an area for further development, so combinations and effects may change during Early Access.
What is still unknown
No official ingredient list, effect list, combination rule, source location or value table is currently published. Even the word used by the game for a successful combination needs to be observed before this archive standardizes on it.
For that reason, the pre-release page contains no ingredient names and no proposed recipes.
How alchemy data will be recorded
The release-day research pass will identify the real interface, terminology and data relationships. A verified record may then connect ingredients, effects, combinations, sources, locations, notes and the tested game version.
A searchable explorer becomes useful only after enough real records exist. The structure will follow the game rather than forcing it into a familiar crafting template.