Agh the inconsistencies in the data export make me so sad.
As far as I can tell, for “Type” the list of all transactions is this:
Monzo.me / Top-up
Bacs (Direct Credit)
Most make sense; but the last 5 - all for varyingly specific Monzo based transactions. Premium Subscription and Monzo Paid are different flavours of Plus, I think. Pre-paid bridge is a one off when Monzo converted accounts to a Current account. But as far as I can tell all of these types have no “name” information:
Monzo to Monzo (some but not all)