Since you show to be from Pakistan, I suggest you talk to your banker in Pakistan. Information may differ considerably from one country to another. Real estate here is the states seems to be at an all time high now. I understand interest rates are going up.
Isn't the whole finance industry completely different for Muslim countries than what is considered normal in the West? Asking on an English language website is less likely to give you quality answers than if you post on a local subreddit or facebook group. The banks have a lot of information on their websites (example: https://askaribank.com/personal/consumer-products/mortgage-finance/regular-mortgage-finance/) but I couldn't see anything about "credit scores". That phrase seems quite American, we talk about "credit rating" in my country, perhaps there's a different phrase I should have been looking for?
If you are, in fact, looking to buy in the U.S., the last time I got a mortgage the banker commented that applicants had to have a score of 700 or higher (out of 850) and the higher up in the 700's you were, the better.