Preamble Packages

[visual dagger]

I am attempting to add some packages to my preamble and keep getting the error message

[package] is not contained in any TeXlive distributions so it cannot be loaded.
Can anyone direct me where to find a list of which packages are supported by TeXlive? I'm having trouble finding this information.
Thanks!

[orchid shoal]

The fastest way is to use the ,ctan command and look at the info it provides:

,ctan chemfig

[full narwhal]

chemfig – Draw molecules with easy syntax

The package provides the command \chemfig{<code>}, which draws molecules using the TikZ package. The <code> argument provides instructions for the drawing operation. While the diagrams produced are essentially 2-dimensional, the package supports many of the conventional notations for illustrating the 3-dimensional layout of a molecule. The package uses TikZ for its actual drawing operations.
​ ​ ​ ​ ​ ​ Sources: /macros/generic/chemfig
Documentation: README, Package documentation (English) , Package documentation (French)
​ ​ ​ ​ ​ ​ Version: 1.6e
​ Contained in: TeX Live as chemfig, MiKTeX as chemfig
​ ​ ​ ​ ​ ​ ​ Topics: Graphics, Generic Macros, Chemistry, e-TeX, Diagrams, PGF TikZ
Read more at CTAN page of the package.

[orchid shoal]

Contained in should say TeXLive like up there

It's also worth checking the package versions, we are still on TeXLive 2020 so only packages in that distribution are available