Does a Character with a Custom Lineage belong to a race, for the purposes of racial requirements?

Tasha’s Cauldron of Everything introduces new character options. In the Customizing Your Origin subsection, there is a side panel that details the Custom Lineage options.

This option allows you to, "instead of choosing one of the game’s races for your character at 1st level", select among a few options to shape your character’s origin.

It is unclear if the resulting character is actually part of an official race, for the purpose of picking racial feats, attuning to race specific magic items, or picking race specific subclasses.