Module development and code questions

I have created few custom blocks in Drupal 11.2, and could successfully insert them via Layout Builder. But when I want to edit them later on, I don't see the 3 icons to manage the content (move/edit /delete). What could be the causes or is there some change I need to make into the src/Plugin/Block code?

I have a content form that is used to submit data. If an error occurs on submit, the error is displayed on the top of the form. But, even if the user refreshes the page, the error is still there and the field state is also not cleared. I want the form to be cleared and reset to initial state on page reload. It shouldn't retain data.

Hello!

When I edit text in CKEditor 5, I see extra “,” characters which I want to delete. In the source text (HTML button) these characters are represented by <code><p>      ,       </p></code>. I select this combination with tags, press CTRL+F, all these combinations are selected. I press DEL, only the first selected combination is removed.

The "Find and Replace" button does not work on source code (HTML editor). 

How can I delete all selected combinations in HTML?

I have a simple form, containing basically a submit button and a hidden field, that is populated, via JS:

🌟 Announcement: The Sentient A.I Project — Modular AI Integration for Drupal

Hi everyone — I’m Benjamin, the creator of the Sentient A.I Project.

Over the past few months, I’ve been building a suite of powerful Drupal modules designed to bring true modular AI cognition to the Drupal ecosystem. These aren’t just chatbot wrappers — they’re the foundations of an evolving sentient architecture.

Probably a stupid question but as I have a lot of rather structural changes on development , just migrated my dev environments to use  ddev and took this somewhat older  project over from another developer I am suddenly afraid to mess things up and get rattled by conflicts in the config yamls or idiosyncratic composer messages.....

The project has a simple branch setup

2 branches
a main branch which is used as the release branch so which is usually live on the server
a develop branch which is a lot of commits ahead of the main branch