There are devices that connect you to the surface with a hose and push air down for you to breathe. I don't endorse any of these (and I'm rather skeptical).

https://www.amazon.com/BLU3-Nemo-Backpack-Spare-Battery/dp/B08GYM6PC8/

https://www.airbuddy.com/

https://www.browniedive.com/

The keywords you want to search are "Tankless Diving".

I would not recommend using any system alone without supervision, as bad air might knock you unconscious.