lots of detail in this topic (below) which is relevant - the post where i show trig page locks reveals that most of those are free - but yes, a 128 step sequence with a particular lock varied on all steps will count as one
the REAL foe in your equation is actually the increased Track count; if you lock Filt-Freq on 128steps of 1 track it’s One lock of your limit spent, but …
If you lock Filt-Freq on only one trig on 16 tracks of any length, that’s Sixteen locks spent already !