Smoothing the intersection boundary of two mesh - Questions

Is there a post-processing effect or method that can smooth the intersection line of two meshes? just like this:(smoothing the intersection area of head and neck)

Kinematics of Origami Structures with Smooth Folds

Smooth

Mesh generation - Wikipedia

High-Order Mesh Morphing for Boundary and Interface Fitting to Implicit Geometries - ScienceDirect

Boundary constrained quadrilateral mesh generation based on domain decomposition and templates - ScienceDirect

Exported STL files from the segmentation has intersection/penetration - Support - 3D Slicer Community

Top: Removal of possible boundary layer mesh collision around corners

Occluding Contour Breakthroughs, Part 2: Getting It Right

Mesh to mesh intersection 3D Slicer - Support - 3D Slicer Community

Development of the 2D Computational Mesh

I am getting this problem, if some one could help : r/CFD

Mesh Smoothing - FreeCAD Documentation

Mesh regularization and adaptive smoothing - ScienceDirect

Figure 1 from Polyhedral surface smoothing with simultaneous mesh

Improving Mesh Smoothing tool in Blender

CENG 789 – Digital Geometry Processing 05- Smoothing and Remeshing