Your download page only shows a couple of archives containing png's
Always willing to give a try although to be honest, your plugins do not really figure in my work flow, but I am interested in appimages. Running these in my old kubuntu 22.04 laptop. They (obviously) share the same User Profile and GEGL plugins folders.
This appimage made from the debs in the 'buntu Gimp3 PPA. It looks like your plugins working.
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ubuntuppa.jpg [ 117.38 KiB | Viewed 4111 times ]
This is the official gimp.org appimage. Your plugins not showing, but is Styles same as Effects Continual Edition ?
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gimpdotorg.jpg [ 131.29 KiB | Viewed 4111 times ]