Here's a Black Watch kilt with the bow-shaped things the regiment calls rosettes:
and being worn by the Drum Major and Pipe Major of that regiment:
It doesn't show up well but the Pipe Major's are shaped like the Drum Major's but made of Royal Stuart tartan ribbon.
Here's another view (in this case the Pipe Major of the Black Watch is the enormous man nicknamed the Big Ugg):
and in the old days:
True rosettes (which by definition have a central button) are worn by the Pipe Major of the Royal Highland Fusiliers, in this case Gavin Stoddart:
and
Gordon Walker, ex military, wears rosettes on his civilian kilt:
But they're not exclusively military, as one of the men shown in
The Highlanders of Scotland has bows to his kilt.
I have this vintage photo of a civilian wearing them:

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