Valorant doesn’t allow you to switch your account region. The servers you can access are decided based on the location of your IP address when you create your account. You can submit an account transfer request if you move to another region, but Valorant rejects requests to change your region to one that you’re not residing in.
However, a VPN (like ExpressVPN) can get around this restriction by changing your IP address. When you connect to a VPN server in another country, your real IP address will be hidden behind an IP address in that country. This will trick Valorant’s systems into thinking that you are located in that country. To change the region of your Valorant account using a VPN, all you have to do is follow 3 simple steps.