Since your customer asked for the audio to be at -17 LUFS,
please be aware that Audacity has some issues when using external plugins on both Mac and WIndows.
It sends the wrong level (too high) to the plugins, so any LUFS measurement will not be true.
(BTW RMS and peak readings on VU/PPM meters etc will also show wrong values).
See here:
and here:
Newer versions (which I don’t use), do have some sort of Loudness Normalization built-in,
but have never used it so can’t comment.
As @DVDdoug wrote, it does not check for clipping.