"Exemptions From the Transit Visa Requirement .... You have a valid visa for Japan, Canada, or the USA, or when you return from those countries after you have used your visa." Belgium Transit Visa - Visa to Transit Through a Belgian Airport https://visaguide.world/europe/belgium-visa/transit-visa/
Belgium Transit Visa - Visa to Transit Through a Belgian Airport https://visaguide.world/europe/belgium-visa/transit-visa/