Modern usage of “evolution” sometimes conflates “change of the organism over time or a lineage between generations” with “Darwinian selection”. Sexual selection is an easy example of evolution that’s not due to Darwinian “natural” selection.
https://www.darwinproject.ac.uk/commentary/evolution/sexual-...
"Change of the organism between generations" is called "genetic drift" if it's undirected and "selection" if it's directed. The concept of "evolution without natural selection" doesn't really exist.
Selection is how you get organisms that appear to be designed for a purpose. Sexual attractiveness is a purpose.