Module development and code questions

ERROR
preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated StreamWrapperManager.php:294

CONTEXT

What module is this a bug in? I hope this is the correct forum to ask this.

This system looks broken

Android, Google Pixel 7a 

Also not clear how the elf to upload an issue screenshot. LoL 

And this isn't even the issue I'm here to check on or create. 😉🙄🤐

Is it possible to capture IDs of clicked-on inputs using logic from a behaviors file when the inputs are used in AJAX?

At a high level, I'd like to capture the IDs of elements when they're clicked-on. It looks like I can do it individually when using a mousedown handler with the respective IDs, but I want it to be more abstract in the sense of having a dynamic way of not needing to reference the ID in the code if possible.

I'm working on a custom module and one of the fields it has on its settings page is an AJAX button configured as follows:

I have created a View that exposes an API endpoint for audit logs. In this View, I configured several exposed filters such as time range and pagination.

My question is: Does Drupal core provide any built-in API or endpoint that returns metadata about these filters (for example which filters are available, filter names, allowed parameters, etc.)?

I want to know if I can call a Drupal API that gives information about all exposed filters for a View.

Thanks!