Below you’ll find an example of how buttons would work on a website. On desktop, you would be able to add a hover because a mouse pointer would be able to hover over the button letting the user know that the element is interactive.
This unfortuntaely isn’t possible on mobile as users tap rather than use an on-screen pointer to navigate around a site or app.
(N.B. These are just examples and would be designed in a way that fits your requirements.)