Metashape edit mesh

[Regon]

Hi there,

im working on a project, where we took pictures of a castle wit a UAV and afterwards scanned some critical spots. After processing the UAV-pictures, I added the scan point cloud and build a mesh and a texture in Metashape. Now I struggle to optimize the mesh I tried a few software options, but I am not convinced of any yet.
Can you recommend any software.
PS: The goal is  to create a 3d-model with the textured mesh.

Thans for your help!