You can already call either 911 or the ten digit suicide hotline humber about suicide. 988 is just shorthand for the full suicide hotline number.
You won’t get in trouble if you call 911 about suicide, but if they think it’s not urgent they may point you to other resources rather than dispatch emergency services. The suicide hotline provides non-emergency resources but can’t emergency dispatch.
Perhaps in the future, more 911 centers will be expanded to include non-emergency suicide resources, but most or all don’t have that right now.
You won’t get in trouble if you call 911 about suicide, but if they think it’s not urgent they may point you to other resources rather than dispatch emergency services. The suicide hotline provides non-emergency resources but can’t emergency dispatch.
Perhaps in the future, more 911 centers will be expanded to include non-emergency suicide resources, but most or all don’t have that right now.