Originally Posted by WineCountryUA

PZ/PN are the inventory classes for upgrades. You can see these for individual flights by enabling Expert Mode in your profile.
PZ2 means there are two upgrades that could clear immediate on application. PZ0 means you will be waitlisted.
GS have their own inventory class, PN. If the upgrade Plus Points came from a GS, then look for PN.
Expert Mode Update: better upgrade visibility and opt-in to see fare bucket data.
Ways to search for upgrade space at booking?
Understanding the United Upgrade List Comprehensively

Originally Posted by spartacusmcfly

You're in luck. You picked two perfect Asian destinations.

1. Maldives - easily reached via Singapore. Singapore will be the first 'small' Asian country to open up. They're approaching 40% of their population having received 1+ dose, and should be fully vaccinated by end of summer. Once Singapore opens to US travelers, PZ will be plentiful on that route.

2. Beijing - China has quietly ramped their vaccination rate to half a billion people/month (not a typo). They're on pace to be the first 'large' Asian country to open -- also should be done by end of summer. Once they open to US travelers, the Beijing routes will have plenty of PZ space.

Finally, don't be discouraged by current PZ availability to Asia. UA has basically turned off PZ into Asia for now. It should turn back on once a major Asian country opens up.

1000+ PPs is a lot. Enjoy!