Some religions may have some things that may resemble some things in Islam.
It is because, usually, all Prophets :as: came with the same message, but people corrupted it over times. Others made false religions taking some from the true religion.
So Islam has not copied anything, rather it is the false religions that has.
See it like this:
A Prophet :as: came with the truth. Some corrupt people made up lies, etc. and took from the truth.. Some stories, say The first 2 sons of Adam :as:, the story of Habil and Qabil may be in other religions, in a corrupt form, or completely different form.
Say Naruto. There were 2 people, who was to be tested, the 1st son got to be the successor, the second, who expected to become the successor, became angry, and wanted to take by force.. This sounds, in the "base form" like a stolen thing from Islam about Habil and Qabil.
Allahu alam.