Hey @Michiel,
This unfortunately will require some custom coding, you’ll have to add PHP to your theme where you’d like the ticket stock to display – but I’ve written a handy “ticket stock” function in this Gist which you can use to show the stock remaining for each ticket in an event → https://gist.github.com/ggwicz/e4d0d46cdf6d3977e5bc
If you don’t like the way that function displays the stock information, change it to whatever suits your needs and use CSS or anything you’d like – this function is just a basic “starter” example function to get you going and to let you see what sort of code is required to display that information.
Play around with that function and let us know if you have any other questions, comments, concerns, etc.
Cheers!
George