Hi Ginte!
The same is true for me. I am a biophysicist and mainly work with computational simulations of biomolecules. What field do you come from?
I think, independent of the research subject or "mode", some form of preregistration adapted to the specific field is always possible and definitely a good idea. By this means, one it "forced" to precisely phrase the research question, work out a detailed plan on what one actually plans to "do" to generate the data to be analyzed - may it be experiments or simulations -, and how this data is to be analyzed, i.e. what quantities will be extracted/calculated/looked at to interpret them and infer the final results. By doing so, one literally thinks through the complete research process from the very beginning to the ultimate end, which I consider to be highly beneficial, although I can imagine that this seems to be kind of hard work initially, when one is not completely into the topic yet.
I will definitely try this out for my next research project!