Looks like
https://myaccount.uscis.dhs.gov lost the case tracking function and is going to some shitty splash page now, the very last grid says 'case checking tool coming soon'.
__________________
Bio Date - 02/22/18 (walked in 2/15)
Expiration - September '18
Approved - 04/09/18
Naturalized via MAVNI | April 2018