DiscordのブラウザUIにボタンを追加し、Discordのチャンネルおよびダイレクトメッセージからメッセージを一括削除します
< Deletecord - Mass Delete Discord Messagesについてのフィードバック
I can't really help troubleshoot your issue without more info. If you're using Brave, another user suggested https://github.com/bekkibau/deletecord/discussions/14#discussion-8120758
Unfortunately, not working. Trash icon does not appear.