These are some m3u list containing mostly "free" (aka publicly available) IPTV streams
Project link https://github.com/iptv-org/iptv
Grouped by country
Same, but grouped by category
It used to be much larger, but here is what's left of it
These URLs must be entered as a new subscription. Go to "TV-Lite" menu, choose "Manage Lists" then "Manage subscriptions". It the new dialog windows press "New" then enter one of the addresses above. Press OK and close the dialogs.