My purchased 2024 set is missing from my account.

My purcahsed content is not showing up in my history on my account

Lots to check here. 

1.  Digital not physical copies, right?

2.  It shows up in your Order History?

3.  Under Account Settings > Licenses, does it show that Account Entitlements are in sync?

What is the content, where are you trying to view it?

Does the payment show up as having gone through on your credit card or whatever was used?

Did you buy it on a different system than the one that you're currently using, or have you had to re-log-in to DDB since purchasing it? Because of the way DDB does logging in, people sometimes end up with multiple accounts without realizing, because they've used two different external sites to log in. (Google and Wizards, for instance.)

(There's also been incidents where the system glitches, and creates a second account for the same external site, but that's highly unusual.)