I don’t know about Amethyst, but at least in nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg and nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 when you see the profile of user on the options there’s one for mute and another one for report 
https://m.primal.net/Kgfl.png