Is there any way besides BroadcastChannel to pass data into a Freedom UI sidebar when it opens?

Hi,

I have a custom Freedom UI sidebar, that I open programmatically from a button on another page using crt.OpenSidebarRequest.

My requirement: every time the sidebar opens, I need to pass dynamic data (a record Id, a record number, etc. — different each time depending on what the user clicked) into the sidebar so it can pre-fill some fields.

What I've tried and confirmed does NOT work:

1. crt.OpenSidebarRequest — only accepts type, sidebarCode, and $context. No params field.
2. Mutating request.$context on the caller before opening, then reading it from the sidebar — turns out the sidebar's $context is a completely separate view-model instance, so changes never propagate across.
3. crt.HandleViewModelResumeRequest / crt.HandleViewModelInitRequest inside the sidebar's inline schema — Init only fires once (the sidebar's view model is created once and never destroyed/recreated on subsequent opens, just hidden/shown), and Resume also only fired on the very first open in my testing, not on every reopen.
4. crt.HandleSidebarOpenRequest — confirmed this only works from an Angular remote module. But even after building the remote module and confirming it fires reliably every single open cycle, the request object only contains { type, sidebarCode } — no $context, so there's no way to push data from the remote module into the sidebar's actual view model fields.

What does work : BroadcastChannel, sent from the caller page's click handler, received in the sidebar's crt.HandleViewModelInitRequest handler (registered once, stays alive for the sidebar's whole lifetime since the view model itself isn't destroyed/recreated). Combined with a "ready" handshake to fix a race condition on the very first open (sidebar's listener isn't registered yet by the time the caller sends, since async init takes a moment).

My question: is there a more "native"/supported way to do this that I'm missing, or is BroadcastChannel genuinely the only mechanism Creatio offers for this in Freedom UI sidebar today? Specifically interested in:

• Whether crt.HandleSidebarOpenRequest's request payload can ever carry custom data (e.g. via some other request type chained before it)
• Whether there's a documented way to get a live reference to the sidebar's own view model from the caller's side
• Whether Creatio has any roadmap plans to add a params/data field to crt.OpenSidebarRequest
  
  Creatio Version - 8.3.3
  
  Thanks