Improved Familiar with Arcanist exploit/feats

[Cards77]

I must be missing something here. No improved familiars are showing in the list even though I have Familiar (exploit) and Improved Familiar (feat).

Is there a source book or something needed to use improved familiars?

I am level 11 with all the prereqs.

See screenshot below.

https://imgur.com/a/XwevWru