Few options are staying hidden and hints are also not present in layout builder custom block

Problem/Motivation

Steps to reproduce

1. Home>Administration>Structure>Content types>Article,under layout options check layout builder.
2. Go to the article node, click on layout.
3. Add block, create a custom block.
4. You will notice that all options are not appearing and also user has no hint that there are options to upload images etc unless the user decides to expand it by a drag.

attaching screen recording

Proposed resolution

There should be hint or any other option so that user come to know straight away about the image upload and other hidden option

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet