When you have made a share purchase it appears in your Activity screen. If it succeeded you get a ‘market buy contract note’ with the company logo as an icon above it. If it was rejected you get a kind of ticket-like display, also with an icon above it.
Please can tapping on the logo/icon take you somewhere useful?
On a successful purchase this could take you to your Portfolio screen, with the relevant company selected.
On a rejected purchase it could take you to the Discovery screen with the relevant company selected.