Could this lead to less funding for palliative care? Is a young person with non-responsive depression a valid context for euthanasia (wouldn’t be legal yet but has been added to the law in other countries like Belgium)?

Belgium still has paliative care, and I find that your charachterisation of the Belgian law isn't correct. So I transalted this Belgian article about it for you.

In order to get euthanasia, four conditions must be met. First, the patient must be willing, both at the time of demand and in the execution of euthanasia. Thus, the patient must be able to make decisions independently. A second condition is that euthanasia is requested in writing several times. Thirdly, the patient must suffer unbearably, physically or mentally. That unbearable suffering - and that is the fourth condition - must be the result of an incurable condition. Thus, the patient must be in a "medically hopeless state".

If these four conditions are met, the euthanasia procedure can be initiated. In the case of mental suffering, there must be at least one month between the first question and the execution of euthanasia. In addition to the doctor who performs the euthanasia, two other independent doctors must also give their advice, including a psychiatrist. This advice is non-binding. Thus, the euthanasia can continue even if the two doctors give a negative advice.

After the euthanasia, the executive physician must submit a registration document to the Federal Euthanasia Control and Evaluation Commission within four working days. This committee, composed of 16 physicians and lawyers, will verify that the euthanasia law was correctly applied and that the conditions were met.

Because, according to many doctors and psychiatrists, the euthanasia legislation in the case of mental suffering was a little too vague, additional guidelines were issued in 2017 and 2019 - partly in response to the euthanasia of Tine Nys - by the Flemish Association for Psychiatrists and the Order of Physicians. These guidelines state, for example, that the three physicians must meet physically to consult, that the patient must be treated, and that the physicians must also involve the patient's next of kin in the euthanasia request.

How often does it happen?

Up to 2018, 19,420 people in Belgium have undergone euthanasia. There are no figures for 2019 yet, but we can assume that the 20,000 mark has been exceeded. The graph (scroll down in the actual article: blue is euthanasia for physical suffering, red is for mental suffering) also shows a strong increase: if you compare 2018 with 2003, it is ten times higher.

The figures also show that the number of euthanasies for psychological suffering is only a very small part, in 2018 it is only 2.8 percent of all euthanasies: 57 people received euthanasia for psychological suffering, while a total of 2,357 people received euthanasia.