Emotional support for my Mum

Hi there,
I’m looking for any advice/ideas for how my family and I can help my Mother’s mental/emotional state, which has taken a dramatic decline in the past few weeks. Mum was diagnosed with terminal stage 3 non small cell lung cancer last September. Since then, she has endured 5 rounds of carbo/taxol and 1 round of immunotherapy. She has suffered every symptom and has had to be hospitalised after each and every treatment received. During her most recent stay in hospital (last week!) her Doctors suggested taking a few months off from treatment all together because it’s making her so ill. They will assess again in 8 weeks but indicated to Mum that they cannot continue with treatment when it is having such adverse side effects. This seems to have signalled the end to Mum, and we fear that she is throwing in the towel. She isn’t bothering to eat at all this week, and though we are a very close family who freely talk about feelings, Mum is barely speaking to any of us. She seems deeply deeply depressed and we are heart broken. We would desperately love for her to talk to somebody experienced (and think she may be open to counselling) but we do not know where to turn and are unsure about what services are currently active or even accessible to her given the situation with COVID. We are beyond devastated....any/all suggestions for my Mum are welcome. Many thanks x