Module development and code questions

Hello. Can someone tell me a possibility or way to work and use the "form mode" of the entities, in drupal 9, the examples for drupal 8 no longer work with drupal 9. Code to use it in a custom module. I need to use them with a conditionality: user, field etc. I need the correct hook and the way to use it. Thanks.

Hi all.

I have my custom entity created from the admin's Drupal 9 interface that also references to other custom entities.

For our decoupled front end, I am developing a module that adds custom resources to the core Rest Api (get, patch, and post):

How to embed Looker in drupal website so users can embed dynamic data tiles as content though iFrames.

Hi,

I am trying to update the metatag robots from "robots" to "index, follow" on nodes. But it is not updating for existing as well as new nodes. It's being reset to "robots" after saving the node.

Indeed the global configurations are already set to "index, follow". Why is this behaviour happening?

Hello I am writing a custom distribution. This distribution contains many modules, some of them I have set to be activated while the distribution is installed, and others it just installs but does not activate. I would like to add one or two pages of forms where you can select which modules to activate. I know that for this I can create the forms in the src/form/install folder and then in the .intall file specify what to do with the form data. But I don't really know how to do it. Can someone give me some tips on how to do it?

Thanks in advance.