Category 1 curative cancer treatments are going ahead where possible and time critical, palliative and life extending treatments it depends on individual centres. If you are a young man with testicular cancer probably surgery and a hold on chemo or an out patient version, end stage lung cancer , possibly not because the risks out weigh the rewards. It's up to individual patient and their teams to decide the safest approach.
I am more worried about the number of those with mental health problems who will fall through the net, isolation, reduced supervision of medication, increased anxiety, it's a perfect storm