This is a list of 3D Plugins I have installed. Each one works enough to show a 3D file and allow the view to pinch and zoom and spin the model. They all have varying amount of options to allow color, lights, animation and file formats. Most support STL files. Newer ones support the GLB and glTF. I also use FBX occasionally because it makes a smaller file.
VRM360 by Maurice
Canvasio3D light by Canvasio3D
3D viewer by BPlugins
WP 3D Thingviewer by Lorenzo Accorinti