Is the requirement that the ticket be bought before 1 March no longer a requirement for the refundable voucher? That verbiage seems to be missing. Here's the current language:

You can request a refundable travel voucher via the link below. You can request a voucher if you bought a ticket with a departure date before 1 July 2022, and you decided to postpone your trip.

https://www.klm.us/information/covid...ravel-vouchers