Quote Originally Posted by MaxWilson View Post
Note: it's an optional addition to an individual PC (kind of like DMG Chapter 7 charms/blessings /bonus feats/bonus skills). It's explicitly NOT a campaign-wide automatic addition to the class, nor is it tied to level except as a prerequisite--a DM might let you choose one of them as a capstone or a tier capstone, for example.
On rereading Tasha's, I think you're not right here.

The wording is as follows:
You gain class features in the Player's Handbook when you reach certain levels in your class. This section offers additional features that you can gain as a warlock. Unlike the features in the Player's Handbook, you don't gain the features here automatically. Consulting with your DM, you decide whether to gain a feature in this section if you meet the level requirement noted in the feature's description. These features can be selected separately from one another; you can use some, all, or none of them.
Empasis mine. Yes, it says 'consulting with your DM', but the stress is still on the player's input not the DM's. They're not in the DM tools section of the book (chapter 4), they're in the character options section with explicit reference to the player deciding.