Hi @boabyd23 firstly apologies for the delayed reply
So, I’m pretty sure that initially it wasn’t showing up because the M1 installer doesn’t contain the AAX that you need for ProTools. But, if you’ve now installed the 32/64 then you should now have the AAX.
Could you check these paths to make sure that the files are there?
Macintosh HD > Library > Application Support > Avid > Audio > Plug-Ins>SubLab.aaxplugin