Module development and code questions

I have a custom module which implements a form using the Form API buildForm.

The form contains fields for user input and field which contain values calculated from user input fields via Ajax callbacks.

The use can enter values into the fields and the calculated field are correctly calculated and display appropriately in the form.

Hi,

For my current site I need some help in understanding best approach or Drupal standards.

Hello.

I'm asking for the community's help again because I think there is a bug in drupal core with the form #state API.

Specifically, checkboxes and lists are not activated as required by form #state.

In the case of checkboxes, the requirement asterisk is not added, but required="required" and aria-required="true" attribute are added, but the checkboxes do not become required.

The same is with the lists except that the asterisk is added, but it is not required either.

I have a list, which I use with the checkbox/radio widget, which is the master.

Hello,

I am learning module development - rendering a table

I expected to see two rows of data but it displays only 1.

Hello, 

I'm the owner of a Drupal7 site and my long time developer/collaborator has now moved on to different business ventures. 

The site he helped me develop uses the Group Module as the basis of a web application we created. 

I've recently updated the D7 core to the latest secure 7.94 version and while updating modules, the only one remaining is the Group module. 
In the module 'Available Updates Report' I see an error message warning that Group Module 7.x-1.0-beta6 is "No Longer Supported"...
 

Hello,

I am learning module development.