Usually this is my experience, of course I don't know other people how to find out one of the coins will be listed in a certain market.

As far as I know, if you register or you are one of the participants of the market, say Binance or your local market, you will get information from gmail three days before the coin is listed in a certain market.

For example:


That's one of the examples of notifications I received, that's my experience, I'll emphasize I don't know other users how to find out about it, of course have different opinions.