РОБОТНОЕ РЕШЕНИЕ:
=ARRAYFORMULA(SUBSTITUTE(TRANSPOSE(SPLIT(REGEXREPLACE(A1,
"(.{70})", "♦$1"&"♀♂♀♂♀"), "♦♀")), "♂", ""))
AI РЕШЕНИЕ:
=ARRAYFORMULA(SUBSTITUTE(TRANSPOSE(SPLIT(REGEXREPLACE(REGEXREPLACE(
REGEXREPLACE(A1&" ", "[\r\n\s]+", " "), "(\S.{0,70})\s",
"$1"&CHAR(10)&"♦"&CHAR(10)&"♦"&CHAR(10)&"♦"), "\n+\z", ""), "♦")), CHAR(10), ""))