If you already have a PlayStation account, you generally cannot change its region to use a gift card from another region. Changing your console or device region will not help either — the gift card must match your PlayStation account region.
If you want to use a gift card from a different region, you can try creating a new PlayStation account and selecting the desired region during registration.
⚠️ Please note: In some cases, PlayStation may verify whether your location matches the selected region, so this method may not always work. Purchases, subscriptions, and account balance will remain tied to the new account and cannot be transferred to your main account.