This is an issue at least on Ubuntu, Regolith and Lineage. Possibly in other OSs too.
My Question or Issue
Today I found out the Artists list is not gone, just tucked away deep in the menus (why anyone would do that is beyond me, it is against the most basic rules of human-machine interfaces). However, the Artists list now only shows two artists, whereas I have hundreds of LPs in my library. Heretofore, all artists with LPs in the Albums list would show in the Artists list, but this is no longer the case.
The question thus is: how can I add artists to the Artists list in the new GUI (version 1.1.55).