iPhone Calendar search
Despite many posts contradicting this, I find that when I search for a event in the calendar app, results only go back one year. I have always had sync set to all events, never a time frame. I can search back indefinitely on my macbook, just none of the iOS devices. Here, the results go back exactly one year. Most event entries have been created on the phone, not the macbook, so the iCloud sync is functioning as expected.
This certainly can not be seen as a feature. It might not technically be a bug, but why this limitation? It makes search essentially useless fo finding, say, a doctors appointment from 5 years ago unless you happen to have a macbook, or a good memory. Which makes the search function nearly useless. Yes, it can search into the future perhaps. But rearward looking is important also, to figure out when you need to schedule the next test you are supposed to get every 5 years, say.
iPhone XS, 13