How to find text (without paragraph mark), replace with text including a paragraph mark

I have read the other texts in If they contain the answer, they are obscure.

I want to search for a section of text containing something, such as “. Text” in a large document. I want to replace with:
". " + New Paragraph + “Text”

How do I do this?

Find/Replace. In the Search for box, enter \. (.*). In the Replace box, enter .\n$1. Click Other options, tick Regular expressions. Replace all.

If this answer helped you, please vote it with :heavy_check_mark: (here on the left). That will help other people with the same question.

You can use the Alternate Find and Replace add-on to do it.