Artovision3d, a company which specializes in collectible art pieces, has now both Civ6 and Civ7 collectibles available.
They are made with acrylic, and come with a certificate of authenticity.
The prices are hefty ($39 to $159), but look magnificent.
In case you want to get any of these, you can them at the website of artovision3d here, and you can discuss these collectibles with us here.