"The search-warrant application process happens in secret in order to avoid tipping off the person whose property may be searched. Any court records related to the warrant application would be sealed. Those records typically remain under seal unless and until a criminal case is brought, and even then, authorities may try to keep the affidavit from public view. The person whose property is being searched is entitled to see the warrant, but not the affidavit."
Link: https://www.latimes.com/world-nation/story/2022-08-10/explainer-trump-mar-a-lago-how-fbi-gets-search-warrant