I did a variant of @halillusion's answer

input[type="date"]::-webkit-calendar-picker-indicator {
  cursor: pointer;
  border-radius: 4px;
  margin-right: 2px;
  opacity: 0.6;
  color-scheme: dark;
  transition-property: all;
  transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
  transition-duration: 150ms;
}

input[type="date"]::-webkit-calendar-picker-indicator:hover {
  opacity: 1
}