Can my ISP see with which peers I'm connected and to see their IP?

Hi! I have a few privacy-related questions.

• Can my ISP see with which peers (contacts) I'm connected (when I chat or send files or voice call or video call) and to see their IP?
• Or maybe they can see some other sensitive information or metadata while using Jami?
• Are there any other third parties that we should be aware of, that could monitor sensitive data/metadata when using a p2p messenger (Jami)?
• If this is all true and the ISP can see all this metadata, can we use some clever technologies to hide it except from using i2p or tor or proxy or a vpn?

Thank you very much.