This is because the Google Play app caches old info for a couple of days. Long press the "Google Play app" (NOT FmT app), and go to App info. Go to Storage & Cache, and Clear the Cache.
Then restart Google Play app, and you may see that new versions of many apps are available.
Otherwise,...
more... you may wait for a day or two, and the cache will clear automatically, and the new version can be seen.
Thanks.