We have modified the type in the app background to board, but the review is still rejected. The review reply is as follows:

HI, Thank you for working with us to fix your app. We are unable to replicate the changes you have made to the App category. We can still see that the App category is in card. Kindly, follow the below guidelines for changing the App category. Make sure your app is in the Games category. The Instant Games product will not show up for apps outside this category. Go to App Dashboard and check the app category. Even if you already have a web game hosted on Facebook.com, or a mobile game on a mobile application storefront, you'll need to create a new Facebook App for your Instant Game. Set Category to "Games" Go to the Basic Settings section of your app and make sure to set the category to Games. Save your changes. https://developers.facebook.com/docs/development/create-an-app/app-dashboard/app-categories Resources for developers: Information about getting started with instant games https://developers.facebook.com/docs/games/build/instant-games/get-started FAQ doc for instant game developers with answer to this https://developers.facebook.com/docs/games/build/instant-games/faq/ File a bug report, if you are facing any challenges while following above steps. For issues with your user account, Facebook.com, using an app you didn’t create, or for feature requests and bug reports for items other than the Platform APIs, please visit our Help Center: https://www.facebook.com/help/ In this case, we request you to fix the issue in order to get your application into compliance state. Please do feel free to reach out to us if you might have any doubts or queries regarding the same. Thank you for your patience, Meta Developer Operations Team.

We don't know what else we need to do, please help us.