Fill Curves Multiple - Geometry node Blender
These 3 node groups create faces inside closed mash polygons or cyclic curves.
You'll get 3 Node Groups :
Fill curves Single (Blender 3.1) - works only for a single mesh polygon or closed curve (but faster)
Fill curves Multiple (Blender 3.1) - works for multiple mesh polygon or closed curve (but slower because "looping nodes") - maximum number of faces - 500
Fill Curves Ultimate (Blender 3.2) - works for multiple mesh polygon or closed curve (much faster, and allows infinite number of faces - but in rarae cases, possible artefacts if veritices of a certain curve or polygon are not coplanar - for these cases better use Fill Curves Multiple)
Watch the full showcase of these nodes here: https://youtu.be/45O51Up5qxw
You'll get 3 Node Groups that create faces inside closed mash polygons or cyclic curves