@switch - similar with the Philippines. In PH, after vaccination, you get a white paper card with your vax details. It's not standard and varies from town ro town, which is $€¥! but that's the way it is. It's good for local travel & establishments, but many countries won't recognize it.
If one wants his/ her PH vaccination to be valid for international travel, one must go to the Bureau of Quarantine website to apply for the yellow WHO-accepted vax card (similar to the one by PAG in the other vaccine thread). There's a long queue for the appointment (needs personal appearance) because there are lots of OFWs who also need the card.