Fix:

const heightModel = computed({
  get: () => props.height ?? "",
  set: (val: string | number) =>
    emits("update:height", val !== "" && val !== undefined ? Number(val) : undefined),
});

const weightModel = computed({
  get: () => props.weight ?? "",
  set: (val: string | number) =>
    emits("update:weight", val !== "" && val !== undefined ? Number(val) : undefined),
});