I don’t think that’s a rope, it looks like 3 Beams for each ‘chain’ with Attachments at around 25% and 75% of the distance between the player and the post.
It appears to be a quadratic curve where each foot is interpreted to be the vertex and the anchor is a point that the curve intersects. With this info you could update the positions of the beams’ Attachments each frame to respect these constraints.