[okok3857]

GRASS v.generalize() has a lot of different methods: https://grass.osgeo.org/grass85/manuals/v.generalize.html. I can't personally speak to the differences but probably worth looking into.

The QGIS Simplify tool also has a Visvalingam method: https://docs.qgis.org/3.40/en/docs/user_manual/processing_al...

It may be interesting to combine a workflow with the QGIS Smooth tool: https://docs.qgis.org/3.40/en/docs/user_manual/processing_al...