code-lab/node_modules/vuetify/lib/components/VDatePicker/VDatePickerYears.css

.v-date-picker-years {
  height: 288px;
  overflow-y: scroll;
}

.v-date-picker-years__content {
  display: grid;
  flex: 1 1;
  justify-content: space-around;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 24px;
  padding-inline: 32px;
}
.v-date-picker-years__content .v-btn {
  padding-inline: 8px;
}