Loft

Loft two curves in Blender Geometry Nodes.

You must provide two curves (not mesh).
The curves can be opened (e.g. a line) or closed (e.g. a circle).
The curves can have any number of points, the node will resample them if the Resample input is larger than 0, otherwise, the curves will be used as they are.
You can decide whether the final lofted mesh will be closed or not.

To import the Node, open Blender, File -> Append, and pick the Loft.blend file, click it twice to see the folder structure inside it and open Node Tree directory, inside, you will find the Loft node, select it and continue.

To use the node, open Geometry Nodes, and add a node (Shift + A) -> Group -> Loft.

The Loft node was created and tested on Blender 3.5.