This is a housing component for WeActStudio's 2.13in link labels, available on AliExpress. The front piece has a cutout for just the link portion of the screen, while the back piece has cutouts for pin access.
The back half has 2 cutouts, one for the vertical pins and one for the 4x2 header, and a smaller cut-out so the screen sits flush. The front piece has 4 very thin pegs to keep the screen in place, which is a press fit into the back piece, keeping the screen in place. If you want to remove the screen and the front piece, push on the cutouts at the back; it should come out without damaging the pins.
For flexibility, the 3mf file includes 3 different body designs:
The author marked this model as their own original creation.