We'd love to inform you that now we could support to translate SEO title and description in the product page and meta title, meta description in the collection page.
Please be advised that you can only translate and manage the translation of SEO for Advance language type.
So you could find all SEO contents in the product page by the way:
Go to the app --> Translation --> Manage Content --> choose target language --> Product --> click on Edit button

Choose your product page you want to translate/edit --> click on Edit button

Choose SEO title/ SEO description --> click on Translate button

NOTE: In case, you do not find SEO title and description in the product in-app, please follow this article to resolve it.
And, we have a good news that from now on, you could translate SEO title and description in the homepage.
Just go to the app --> Translation --> Mange content --> choose target language --> Shop meta title & description --> Edit button

Click on Translate button to translate Title/Description or tick on all elements --> Bulk action button --> Translate

More details, please check out here.
References
Adding keywords for SEO to your Shopify store
Hope this helps you a lot.
Should you need further support, please feel free to contact us via live chat or email us at support@fireapps.io
Please be advised that you can only translate and manage the translation of SEO for Advance language type.
So you could find all SEO contents in the product page by the way:
Go to the app --> Translation --> Manage Content --> choose target language --> Product --> click on Edit button

Choose your product page you want to translate/edit --> click on Edit button

Choose SEO title/ SEO description --> click on Translate button

NOTE: In case, you do not find SEO title and description in the product in-app, please follow this article to resolve it.
And, we have a good news that from now on, you could translate SEO title and description in the homepage.
Just go to the app --> Translation --> Mange content --> choose target language --> Shop meta title & description --> Edit button

Click on Translate button to translate Title/Description or tick on all elements --> Bulk action button --> Translate

More details, please check out here.
References
Adding keywords for SEO to your Shopify store
Hope this helps you a lot.
Should you need further support, please feel free to contact us via live chat or email us at support@fireapps.io
Updated on: 14 / 12 / 2021