Module development and code questions

I have a strange problem and can't find an answer on the forum.

I tried to follow the steps of the Drupal Handbook to generate an content  entity module by doing the following steps:

drush generate entity:content 

After this i have the following file Structure:

Hey Drupal Developers,

I have recently taken up a task to do the following:

1. Set up a custom module
2. Consume an API once a day
3. Save it to the database
4. Retrieve the data and display where ever necessary

Attempt 1:

• I created a custom block.
• Overided the block in the theme, e.g block--block.html.twig.
• Added JS to fetch and customized the data to suit.
• The realized I had no way to save it or access the Drupal API to save the data.

Attempt 2:

I am trying to find all nodes that use a specific paragraph field (populated) in order to replace each instance with a different field type. Can't seem to be able to get what I need with a view and I'm not quite sure if I can get to where I need in the db. Any suggestions on a way to get them in a hook/twig?

Hello,

I'm currently working on a module and having the folowing error

"data-error-switching-to-ckeditor5"

This error happens when I am in a "text and format editor" and when I do one of the following : 
- Add/Remove the the module icon from the toolbar
- Click on the module checkbox in the "Enabled filters" area
- Switch the "Text editor" between CKEditor5 and none

The code worked fine on drupal 9.5 with CKeditor but going to drupal10 with CKEditor5 raised this error

I have tried to include an iframe (For example:- with src="domainA.com/page1") in Domain B for accessing a page of Domain B.

But I got an error that Domain B has been blocked by Domain A due to CORs policy.

I tried to possibilities:-

 1) I have included domain B in the settings.php of Domain A as a trust_host_pattern and hence that error was not showing now.

But still I am not able to access the page, which I tried to access using iframe.

2) I have tried to enable CORs settings in sites/default/services.yml like below:-

Hello,

I'm using Acquia site studio, and I don't have much experience.