Alright, in the end Lost Lace took about 10 tries. Not the worst considering my Silksong record.
1 hour for 1% completion, nice. A lot of those hours are just game opened while I was AFK, but still.
I couldn't find 2 fleas and couldn't find the last needle upgrade (assuming it exists).
Don't know what else could I possibly miss, 7% is kinda chunky. I even got Mr Mushroom cutscene.