There will definitely not be any harm from this, but don't expect much benefit either.
Protein is, in fact, a concentrated protein that is needed for muscles . In large quantities, it is needed by athletes who, during exercise, break down protein in the muscles. They consume up to 2-2.2 protein per 1 kg of their weight per day.
As far as I understand, you go in for sports, since you know about bza, etc. In general, from a couple of teaspoons of protein you will get a small portion of protein , but it is too small to have an effect on the body, muscle growth.
You can replace this portion with regular foods - cottage cheese, meat.
And I still advise you to take protein according to the classical scheme - 2 times a day in equal portions , between meals on regular days, and on training days you can drink cocktails before and after training.
In addition, on training days, many athletes add another morning portion: they drink protein immediately after waking up me. But this is not a couple of teaspoons, but a full serving . This will give you the amount of protein you need, which will have a positive effect on muscle mass.
It certainly won't be harmful, but eating a few eggs or cottage cheese will be much healthier. And it's even cheaper. In fact, all this food hype is exaggerated enough. Marketing move. As recent studies show, the body does not care when you eat, the main thing is that you eat once a day. So to reach such fanaticism, as every time you go to the toilet at night, there are a couple of spoons of protein - it seems to me excessive.
Protein is a set of essential amino acids, I think there is nothing wrong with drinking it in the morning, as a supplement to breakfast, of course. In any case, at night the body's metabolism does not stop and, one way or another, the muscle protein is partially destroyed and metabolized by the body, and with the help of protein you can add material to the body for nutrition and "building" the necessary structures, including muscles.