"zaps n reactions" are stored in RELAYS - who see what depends from RELAYS they r reading at THAT MOMENT sometime wait to see likes or zap figure increase slowly 
here is screen of relay for example just to be more vivid in explaining kinf 7 , 9735, 9735 
https://image.nostr.build/8ca4d3dd02beb1cd49b74502e9188583e704e713e84294e5f1362ca606d9da0f.png