Don’t know if mods will block my link later, but here is a link for 13.0.30 dmg (from my backup):
https://www.dropbox.com/scl/fi/x5803t8t2w19h1h6rot4i/Cubase_13.0.30_Installer_mac.dmg?rlkey=qyp5rdof5yf43vf487mjiu1vo&st=qtpo5bjh&dl=0