Style Accordion Block - Icon to Reveal

@CJoose Hi !  You can try adding this code snippet under Utilities > Website Tools > Custom CSS.

.accordion-icon-container {
   border: 1px solid !important;
   border-radius: 50% !important;
   padding: 10px !important;
 
}
.sqs-block-accordion .plus__horizontal-line, .sqs-block-accordion .plus__vertical-line {
    width: 50% !important;
}