This is an breadboard for Arduino Uno R3/R4 and a Nextion 5" Intelligent Series Display (NX8048P050). The connector/microsd card for the display spared out & on the left side there is some space for small electronic parts.
You may use some clinch nuts: https://www.amazon.de/gp/product/B08K1BVGN9
Printed on Bambu X1 - Prusa MK3/4 Heatbed is to small.
The author marked this model as their own original creation.