I agree, personal purchase PCP/Cash/Finance generally only comes with 1 cable from the majority of comments I have seen over the years.
Personally my PCP purchase came with a granny lead.
Purchased the Type2 MG from the dealer at the same time, just so it could be bundled into the finance. Could have got a little cheaper elsewhere - but at least it comes in a nice bag.
Also to note (not that it matters for the current MG4) but the MG Type 2 Cable is only single phase... so if planning on keeping and using on a different car in the future, that has 3phase charging, the cable won't be up to scatch.