This will really be dependent on the client.
#Primal for example shows the top zap under the post without clicking on zaps to see them all.
With nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955, you just see the number of zaps on the post and have to go into the zaps to see them. Not sure it always used to be like that.