H1 transfer -Notice Explaining USCIS Actions Was Mailed

I checked the H1 transfer status and it status the below. It’ll be a couple of days till the attorney receives the notice. Did anyone get such notices/aware of such?

Notice Explaining USCIS Actions Was Mailed

On ********* **, 2021, we began reviewing your Form I-129, Petition for a Nonimmigrant Worker, Receipt Number ********. We mailed you a notice informing you of the action we intend to take on your case. Please follow the instructions in the notice and submit any requested materials. If you do not receive