no seriously, when you properly alias something in your .bashrc, they only take effect in an interactive shell.
ie: an `alias ll='ls -halF' in your bashrc does not work if you do `bash -c 'll' nor `./fileThatContainsll`
.. but exa is not backwards compatible with ls OOPS
Which is why I stick with ls (and grep instead of rg and coreutils instead of shiny rust equivalent), I can't deal with the cognitive dissonance that arises from these differences.