Spells missing

On a bard at 10th level I should be able to choose Bigby’s hand as one of my Aditional Secrets spells. Is there a reason it isn’t on the list?

You need a purchase from the Marketplace to unlock that spell.

D&D Beyond can be used for free and contains information from the following "free to use" sources published by Wizards of the Coast:  D&D 5th edition SRD, D&D 5th edition Basic Rules, and Elemental Evil Companion.

Content from other sources, such as the Player's Handbook, Dungeon Master's Guide, or Monster Manual, will need to be purchased from the Marketplace or accessed via another user sharing content with you via their Master Tier Subscription.

Thanks