=LET(
  i, SEQUENCE(100),
  isDivBy3, MOD(i, 3) = 0,
  isDivBy5, MOD(i, 5) = 0,
  IFS(
    isDivBy3 * isDivBy5, "FizzBuzz",
    isDivBy3, "Fizz",
    isDivBy5, "Buzz",
    TRUE, i
  )
 )