Hi there,

Welcome to SeaTheme forum.
It is possible by custom CSS(“Appearance > Customize: Additional CSS”), like:

1.

.top-slider .slider-headding-1 {
    font-size: clamp(50px, 13vw, 200px);
    line-height: 0.8;
}
/*for mobile: */
@media (max-width: 480px) { 
  .top-slider .slider-headding-1 {
     font-size: clamp(50px, 18vw, 200px);
  } 
}

tips:You can change font-size by 13vw, 200px is the max-size.

2.

.slider-con { 
    padding-left: 0;
    padding-right: 0;
}
.slider-con-inn h4 {
    text-align: left!important;
}
/*for mobile: */
@media (max-width: 480px){
  .responsive-ux .text-slider-inn {
    padding: 0 20px;
  }
}

3.

.top-slider.top-slider-text { 
    height: calc(100vh + 80px);
}
.text-slider-inn.middle-ux {
    top: calc(54% + 40px);
}
/*for mobile: We don't suggest you add the CSS, the height size will be too big. */
@media (max-width: 480px){
 .responsive-ux .top-slider { 
    max-height: calc(100vh + 80px);
  }
}

tips: The default height is calc(100vh - 80px).

Regards!
SeaTheme – FAQs – WordPress Customization – Facebook