Playstation chat not showing other players posts/trades or comments

Hi,

You will have more luck finding people in the lower chat channels, such as 1 or 2, since most players will be placed in these ones by default.

You can do this by hovering the chat channel at the top of your chat and pressing Triangle on it, then inputting the number you want after /global or /trade. For example, /global 1 or /trade 1.