IKEA will send missing parts to you
A missing component or two from the stuff you bought at IKEA isn’t that uncommon. In fact, there have been countless memes about how annoying it is to take an Expedit shelf home only to realize that it’s missing a crucial part. If this happens to you, you don’t have to be a Karen about it. Just head on back to the store, tell them what’s missing, and they’ll get it for you without asking further questions.
If you don’t want to make the trip back to IKEA, you can also give them a call and let them know. They might ask for proof of purchase, but after everything is in order, just wait by the mailbox until you receive the missing part.