gxbriceno

There’s nothing to worry about here. The interview is scheduled at least 30 days in advance unless it’s extremely abnormal. A winter storm has been moving across the US, and with COVID, the mail is extremely slow lately.
 
It took 3 weeks (!!) for us to receive the interview notice after the status tracker updated. But if you haven’t received the notice in 7-10 days, a Tier 2 can tell you the date of the interview and will most likely send you a scan of the notice.
 
Just be patient and request a Tier 2 if it’s been 10+ days.

I'd give it 7-10 business days. If you haven't received anything until then, I'd try calling them!

There will be no update with the actual appointment date for AOS.

For naturalization we got the appointment letter 2 weeks later. Website updated a few days after the “we mailed/scheduled appt letter” so my suggestion is to check your USCIS account daily as that may be updated prior to receiving letter in the mail 

Same, I got notified Friday that my interview has been scheduled... i was a little concerned with how long it would take to arrive in the mail, since my bio appointment letter arrived late, so I called them, they said wait 7 days if nothing then call them

Not personally and not for this type of AOS, but from what I heard you should definitely write to the representatives in your state asking for help!
A friend of mine wrote to the Colorado Senators' offices after RFEs and delays in her H-1B extension process, and one Senator promptly responded and made it go through!