How do I get the block overlays, when I have set baritone on mine, the bit where it shows its path and the surrounding blocks I want it to mine.

Does removing optifine help?
If not, do you perhaps have renderPath and renderGoal set to false?

Remove iris
If that doesnt work. Give mods list and #modified

I dont believe Im using iris, I am currently using optifine and baritone.