this does not work?
```
let context = page.browserContext()
await context.overridePermissions(‘https://example.com', [‘geolocation’])
await page.setGeolocation({
accuracy: 100,
latitude: 51.50,
longitude: -0.13
})
```

Find how they are getting your location.
If they are checking language header, change header.
If they are using your ip address, add proxy url from that country.