The Blu-ray coming from criterion has a 4K scan. The Film they scanned was the EXACT same film that John waters (The director) used to splice and edit the film together. That exact print they scanned was in John Waters’ attic for decades. unless criterion cut scenes from that scanned print (Which I highly doubt they did)
seeing that criterion released “Salo: or the 120 days of sodom”, I think it’s safe to say that Pink Flamingos will be the uncut version. thankfully.
Hope this helps.
Can’t wait to see the new restoration from criterion because PF is one of my favourite films of all time.