What's a shard? Pls elaborate
A shard is a collection of game servers and platform resources that serves a given VALORANT player population. So, for example, the Asia Pacific shard consists of a set of platform resources (services and databases) hosted in Singapore, and then game servers in Singapore, Mumbai, Hong Kong, Tokyo and Sydney. All players in the AP shard's countries (basically everything east and south of India, China and Russia) will play on the best game servers, based on their latency and who they're grouped with. Players can only player against other players in the same shard.
The other shards are America (split into North America, LATAM, Brazil zones), Europe and Korea.