Here’s the comprehensive thread regarding the missing top 500 rewards for season 36 mentioned above: Season 36 Missing Top 500 Rewards. Please do spread the message about this bug it really does help a lot.
As for the state of Ana at the moment, I do believe she is incredibly powerful and needs some very minor nerfs as she can be oppressive against tanks especially due to their hitbox size, especially the newly nerfed Roadhog. However, I believe Kiriko is a much larger problem than Ana, particularly from the utility of suzu and kitsune rush, not to mention the fact her suzu counters both of Ana’s abilities. Being slept and antinaded as a tank is devastating but it also counterable. Suzu and immortality field come to mind find but in rare situations abilities such as deflect and ice wall can also help. In addition, Ana using both her abilities on the tank leaves her incredibly vulnerable as she has no defensive or mobility options other than those provided by her team. The solution then is to either run supports that can counter Ana’s combo or capitalize on her vulnerability to quickly eliminate her. While she is incredibly strong at the moment, she is not overpowered quite like Kiriko is and that is who I’d look to change first. Just my personal opinion though.