Pleats coming unsewn

[Tartan Hiker]

As others have said, it definitely looks like your steeking has come undone. The steeking is an important element, supporting the top of the pleats where the cut-outs end. This needs to be repaired.

The ragged tartan edges are not a worry. They look like things are coming undone but all kilts look like this inside the lining where you can't see!

I'm sure that any competent seamstress or tailor could peek under the lining where the steeking is still intact, see what it should look like, then effect a satisfactory repair.