MacOS: Whole Library Not Scanned

I installed Serviio on my Mac Mini running High Sierra, to see if it would solve problems that I’m having with MinimServer. All .ALACs are stored in my iTunes library. However, even after telling Serviio where my files are stored, after three days of leaving the Mac running and letting Serviio do its thing, not all my albums can be seen (I’m using a Naim ND5 XS and the Naim app). I have eleven Yes albums, for just one example, but only one shows up in the Naim app when Serviio is chosen as the server. I only have around 720 albums, so I think the initial indexing should have completed… is there any way to manually ‘kickstart’ indexing..?

TIA,

Tim