I've gotten bitten by Google locking me out of an account because I hadn't logged into it in a long time, and the device that I used to log into it was stolen long ago. Even though I have full access to the recovery email address on that account, because it's an unknown device, Google blocks me from accessing it.
In a similar way but a different mechanism, I also had the same thing happen with some accounts which I had opened up using my mobile phone number. I have struggled with mental illness throughout my life, and one of the things that can happen through crises in particular that can have vicious consequences is having no ability to regulate your behavior, in particular your finances, so you easily and quickly wrack up debt, cash out retirement accounts and blow through all that money, and being unable to pay your phone bill (or any other bill) leads you to losing that phone number, and any account which you access through that number.
The systems that we use as a society to authenticate identity for access to digital services and systems, is incredibly punishing to people who struggle with mental health issues. It's a bit of an own goal, since some of the potential solutions to it are potentially technical in nature rather than requiring legislative or societal action.
That said, the difficulties presented by the digital world to people who struggle with mental illness pale in comparison to those they face in the physical world, and how ineffective the society, governments, and medicine are at helping those people, sometimes hurting them in that process through lack of training, ability, and the flaws in the design of the overall systems.