TRY these first: Meshroom
https://github.com/alicevision/meshroom; Mesh Lab
MeshLab
I'm pretty sure Meshroom is made for STL and 3d printinng.
I use camera tracking/solving software to rebuild an entire scene or an object aka Mesh Building. I use Anderson Technologies, Synth Eyes. But it has a price tag. It may have a free 30 day use version, not sure.
I'm not sure if Mocha Pro's camera solver can create a 3d object.
You could also try using an Iphone 12 (by attaching it to the drone). They have free apps that reconstruct objects in 3d using the phone's LIDAR scanner.