Try Adding your domain in it. Like this.

res.set_cookie(
    key="SOME_KEY",
    value=cookie_value,
    httponly=True,
    samesite="none",
    path="/",
    max_age=1000,
    expires=COOKIE_EXPIRY_DATE_TIME,
    secure=True,
    domain="example.com", # <-- Add this line
)