I've made a pull request to qBittorrent that enables display of I2P peers in the WebUI peer list. Previously, it only displayed I2P peers on the GUI version.
Check it out here: https://github.com/qbittorrent/qBittorrent/pull/23061
You may apply the patch (append ".diff" or ".patch" to the URL to download it) and compile qBT yourself (it's not that hard), to get this feature before it gets into a qBT release.