Bear in mind that you will have to wait to disembark, wait for luggage to be delivered, clear customs and immigration, and find your way to the railway station in the "hour" you will be on the ground.

Looking at the data on Flight Aware, that flight has arrived as early as 08:05, and arrived as late as 10:26, in the period since 18 January.

There is no direct service from Brussels Airport railway station to the Netherlands. Depending on what type of service you have booked (and bear in mind that the Fyra "high speed" service is currently suspended until further notice), you may be able to change your ticket more easily than the conditions of the ticket allowed at the time you bought it.