How to access node js project with ip vps ?

Hello, sry for asking
but i struggling to access my node js project, people say you can access the project with (ip) : (port the project), but i cant, it still keep loading then return 'this site can be reached', i am new to vps or deploying like this, may i know how to?
i am deploying nuxt js project and used port 3000

'Took to long to respond'
thank you!