Einstein Bots are available with Service Cloud and hence they can also be setup with a Community. Although, Bots are more contextual for anonymous user queries.
Einstein ボットは Service Cloud で使用できるため、コミュニティでセットアップすることもできます。ただし、ボットは匿名ユーザーのクエリに対してよりコンテキストに依存しています。
It seems that you can get it using Chat API.
Give Chat Customers an Estimated Wait Time (Beta)
https://help.salesforce.com/s/articleView?id=release-notes.rn_omnichannel_estimated_wait.htm&release=222&type=5
chat Transcript is stucked with "Waiting"
Under certain circumstances, Chat Service Channel is not created. Any other custom Service Channel, even if set to Chat, will not work for chat routing using Omni-Channel. Please disable the Chat and Omni Channel, then re-enable, which will lead to the creation of the default service channel.