I’d say yes, if it has been shown publicly by the client, who ultimately own the design and they paid for it.
Just to be on the safe side, I’d just check with your employer but I’d assume that you should be able to show the work in your portfolio.
One thing to look out for though is that the client might want to control the PR around the project and product.
So I would be careful about posting it online or share material, renders, process or other parts of the work that hasn’t been publicized by the client.
They might also have requested that whoever did the design work would remain hidden. Some contracts are structured like this in which case you would only be allowed to show this work in private or not at all.
I’d just check with your superiors and legal.
Congrats on getting your design out there 