You saved yourself with the qualifier. But why even comment on it? The re-indexing thing is a well known phenomenon. If it’s happening after 2-3 days, then it’s a thing. Until then, it’s really not.
Please, stop spreading this indexing lie. It’s not possible that your phone takes up to 3 days indexing. It should be completed the first night when you’re charging it.
There is no evidence that iPhones take this long to index stuff, especially when the device has already been set up!