I've put several hours into my new world (Bedrock) before realizing that I've been seeing a lot more glow squids than I'm used to, and no normal squids at all.  I am using the Cliffs and Caves features, in case there's anything to that.

(Seed: 1216515761)
My spawn point's right on the edge of the water - ocean, rivers nearby, ponds, puddles, flooded and underwater ravines... None of them are producing standard squids.  Only glow squids.  If you go coords (-305, -220), you'll find a flooded cave system.  Almost always a few glow squids and the occasional axolotl.  Never a standard squid though.  And I've never seen one in the adjacent ocean.