Instance is hexbear.net, check it out for yourself, doesn’t work in browser for me without an account but it does work in liftoff without one for some reason.
It is weird that a lot of commenters here want to tell you what they are but don’t say how to find this information by yourself.
There is no content in these communities, they are for discussion. Linking to content is against the rules in fact.
Try ttv-lol-pro, it works for me.