Canada 50¢ Nickel Proofs: missing from catalogue?

For the 4th portrait Canadian 50-cent-pieces, most years only list BU, Prooflike, and Specimen varieties.

I have one from 2016 that is a true Proof, that is, it has a frosted design on a mirrored planchet. It is magnetic and therefore not silver.

Is there a separate listing for these that I'm missing?

I'm new here and am still figuring things out, so my apologies if I've missed something!

Welcome to Numista.

No, you didn't miss anything, it's not in our catalog yet. And it definitely exists: https://www.coinsandcanada.com/coins-prices.php?coin=50-cents-2016&years=50-cents-2004-2023&issue=1

You can make a change request to get it added to our catalog: go to the end of the coin page and click on “Modify or add data on this page”:

The year lines are open so you can fill in a new year line for the 2016 proof.

Use this forum post (https://en.numista.com/forum/topic177619.html) as source and proof of its existence.