Reply To: shop page are empty and category not work will

I discovered that there are also many elements missing from the theme
I did not delete anything and I did not even do much work on the theme, but most of the elements of the theme are missing, so the purchase process is non-existent due to this.
I reinstalled the theme again, but that will cost me the loss of the home page
Can I restore everything that was in the theme without losing the start page??