Currently it is possible to filter tracks with lyrics, but unfortunately it is not possible to distinguish between lyrics with and without timing.
Since I sometimes do listening sessions where I only want to hear/see songs with synchronized lyrics, it would be a very useful feature if I could only add such tracks to the queue.
I have helped myself in this regard with a separate tag, but since some synchronized lyrics disappear again and others are added, I would have to search and tag my tracks with lyrics for them every time.