doesn't generate other formats on "nuxt generate"

Working with
```json
"@nuxt/image-edge": "^1.0.0-rc.1-28164352.ad7c010",
"nuxt": "^3.6.5",
```

```js
image: {
    format: ['webp'],
    provider: 'ipx',
    ipx: {
        modifiers: {
            quality: '80',
            format: ['webp']
        }
    }
}
```

tried on macbook air m2 and netlify builds. The images are transformed but no other formats are generated.