> Have they tried just mandating these companies make a gas stove that doesn’t poison the users?
They might do exactly that.
The exact quote from the interview (https://www.latimes.com/business/story/2023-01-09/us-safety-...):
"'This is a hidden hazard,' Richard Trumka Jr., an agency commissioner, said in an interview. 'Any option is on the table. Products that can’t be made safe can be banned.'"
The mitigations you propose would seem to fall within the "made safe" category.
Also in the LA Times piece, emphasis mine:
"The Consumer Product Safety Commission, which has a staff of roughly 500, plans to open public comment on hazards posed by gas stoves later this winter. Besides barring the manufacture or import of gas stoves, options include setting standards on emissions from the appliances, Trumka said."