The market adoption of hydrogen engines in heavy-duty vehicles and non-road mobile machinery requires emission aftertreatment with particulate filter technology integration to meet stringent Euro 7 emission legislation for PN10 and NOx. This study investigates the efficiency of particulate filters in reducing PN10 emissions under various transient drive cycles, including WHTC, NRTC, and real-driving cycle condition. The impact of varying transient engine raw emissions and urea dosing will be discussed. The urea dosing is known to be another source of PN10 particulates formation. In addition, the layout of the emission control system and its particulate filter integration can have an impact on the overall system performance. By analysing examples of system combinations and filter technologies, we highlight the critical importance of an optimized emission control design in maintaining compliance with emission standards and ensuring sustainable hydrogen combustion powertrain solutions be brought to the market.