I’ve found that being a native english speaker and offering to have quick calls/chats with those who are learning is a great way to chat with new people. I get to meet cool people from all around the world, it’s a great experience and I haven’t had to deal with any weirdos, unlike stranger chat websites where finding someone normal is a challenge. I specifically joined an English discord server, you’ll be surprised how many people will want to contact you if you just introduce yourself as a native speaker whiling to talk.

what incentive would there be for someone to participate? "social media" like this or reddit is the closest you'd get

Omegle might be what you are looking for, you have to sift through some weirdos though