I found the information here under notices. I have attached a screenshot of it and placed a check mark by it. You will have to wait for it to update sometime during the month of June.
Sure! Right here in Samsung Members. My Inbox (the bell at the top right) has two tabs - Notices and Activity. Notices has the Android 12 schedule which I clicked on and scrolled down until I found the information about your tablet. As I found out this month, Android 12 isn't set for exactly a certain date of the month, so we will have to wait until our tablets get the notification. Mine will be in May (Tab S6).