Here's Yoruichi from Bleach showing off a bunch of different panty tags from Danbooru: https://danbooru.donmai.us/wiki_pages/tag_group%3Apanties

Individuals at: https://imgbox.com/g/5Z72Nkh8YX

I'm using the stealth metadata plugin at https://github.com/neggles/sd-webui-stealth-pnginfo so the metadata should still be with the images but you may need the plugin or another metadata viewer that looks at the alpha channel to see it.