Hi @niftitalks,

I hope you are well today and thank you for your question.

Sure you can achieve it by adding the following CSS code in the Custom CSS code option of your theme on the below path.

Admin Area -> Appearance -> Theme Settings -> Custom Code -> CSS Code

#sidebar button,
html #sidebar input[type=button],
#sidebar input[type=reset],
#sidebar input[type=submit] {
    border-radius: 17px;
}

Best regards,
Shufflehound team