Yea, mine disappeared last week... found the work around,,, look for the app named drive modes and click the upper left side where it says performance pages... hoping I am lucky enough to get it back at some point, but glad I saw the post on here as I thought operator error and I somehow deleted it from the app menu,lol
My performance pages have been missing for about two mi=onths from the app pages. Followed the tip above and found it in the drive mode app. Was able to check all through it, etc. But when I went back to the apps page, it still isn't there.
Glad I am able to find it again, but how to get it back on the apps page?