The B service is an engine oil and filter change, plus cabin/pollen filter change, plus some checks.
As for additional items... 2018 should be the car's 10th service.
IF everything was done by the book so far, and IF all additional items were replaced on time (and not mileage), then it should only need brake fluid change (due every 2 years).
But you should check that the following were indeed done on time:
Spark plugs - every 4 years
Fuel filter - every 4 years (15 years on later models)
Air filter - every 4 years
ATF (if automatic) - either 'sealed for life' or every 4 years (5 years on later models)