Interesting! I wonder why the channel list does not contain any 5 GHz entries. If you're really connected at 5 GHz, you'd think that there would be a 5 GHz channel in the list. Are you running both 2.4 and 5 GHz, or did you disable 2.4 GHz for testing purposes?
As far as commands go, Kobo uses BusyBox, so you're limited to the commands it supports, unlike with a full Linux distro. Thankfully, at least iwlist is available for diagnosing this.
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