Hi @Ramman ,i love the support and advice others have already given, and i won't repeat it myself.
Speaking as someone who is/has been the suicidal daughter of a very caring mother who has tried to support as much as possible... Being unable to "fix" the problem, or being burntout and exhausted and needing to prioritise YOUR wellbeing is not "failing her". I can't know how it has fully impacts my mother, but I've been grateful knowing that she does take care of her needs, energy and self-responsibility. I am aware that I am in the extreme-percentile of empathy-consideration for others, and the idea of my mother destroying her life to try to help me is not what I'd ever want.
One thing my mother has been able to do is help enpurage me to get supports where I need them - psychologist, home-help, etc.
When she is able she will also help, but when she is needing rest she can pull back knowing I have the basics (shelter, food, a counsellor to talk to, and the openness to wake her up at midnight if i need to in a crisis-level state).
From my perspective, the key is whether your daughter wants help (or is at least willing to try). And if not, what would it take for her to be willing to give it another shot?
For myself, i felt able to persue what is to be my new attempt at recovery only because I know I have my mother's backing. I'm taking time off work for as long as i need (even if I run out of paid sick leave - this is where my mums support is crucial, for accommodation) to try to reengage emotionally with life. Its scary! What if I recover but realise I cannot work and sustain adequate MH? I don't know - but I will cross that bridge *if* its the case at the time, because I KNOW my mother would prefer to pay for my living expenses with her than for me to not exist anymore. Knowing that is her *preference* and she is prepared that it could be the situation is transformative to knowing its OK if I find myself but also find myself limited in work capacity. I had never been able to accept that as a possible solution until she offered it as an option.