Hi Akram,
Thanks for your questions. Please see the answers below:
Can it be used to create multiple fields in group like we do in a metabox.
Yes, you can absolutely do that. All groups created with Meta Box Group work!
To create a group of fields and can those be cloned or not ?
Yes, cloning fields is supported.
How to show posts list of pages or any custom post type, where are available options and things like that ?
This is just a normal WP_Query, and I don't think it has relation with blocks.
If you're referring to something like search and filtering, you might want to use FacetWP plugin, which we have an integration for.
Can we show taxonomies as well to chose from and stuff we usually do with meta boxes is all available or is there any thing missing ?
Yes, you can show and choose anything within a block, just like normal meta boxes.
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