Tell me more about this 2019 Enhanced Sacagawea dollar

While looking through Sacagawea dollar coin facts, I stumbled onto 2 listings for the 2019-P Enhanced Sacagawea...
It has 2 entries,
**1st: **https://pcgs.com/coinfacts/coin/2019-p-1-native-american-enhanced-position/871548
**2nd: **https://pcgs.com/coinfacts/coin/2019-p-1-native-american-enhanced-coin-currency-set-position/784915
1st coin only has 1 graded while the 2nd has over 1,000
What's so special about the 1st coin that only 1 was graded?
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Comments
Different label, it appears. I don't think anything more. The other label are designated from the coin and currency set.
All comments reflect the opinion of the author, even when irrefutably accurate.
All the other labels are under the 2nd coin. Seems odd to have a separate listing.