Hello TechnoVisionCore,
Thank you for reaching out to us with your inquiry.
Border-radius can be edited via Theme options > Styling.
Every element, like images and so on has settings for border-radius, for example, https://prnt.sc/vHtHPb7tvYMK
If you have any additional questions or concerns, please do not hesitate to reach out to us. Our support team is always available to assist you.
Best Regards,
8Theme’s Team