"research" is stretching it a bit 😅I just did a bog standard masters, I am not an academic, I am a lawyer now!
Yes, Abraham is considered a key patriarch in Judaism, Christianity, and Islam, and his life is traditionally dated to around 2000 BCE with his birthplace thought to be in Ur Mesopotamia, which is modern Iraq.
In Judaism, Abraham is regarded as the founding father of the Jewish people and his life story is mostly told in Genesis, where he is seen as the first to make a covenant with God. So I suppose, the first "Jew"!
In Christianity, Jesus is described as a descendant of Abraham (and obviously as Genesis is also part of the Christian Bible it includes the same stories). In Islam, Abraham is considered one of the prophets and a model of submission to God. So important to all three but I suppose his significance became less over the iterations.
Whether he existed in real life or not, I don't know. There is no evidence to definitively prove he ever existed as described in religious texts.
There are some (many actually) biblical events and figures who's existence and parts of their story are supported by actual evidence. For example the life of John the Baptist is supported by multiple Gospels, and a respected non-Christian account by a Jewish historian - Flavius Josephus - a Jewish historian born in 37 CE in Jerusalem, who later became an ally of the Romans and wrote important works on Jewish history. Anyway, he describes John The Baptist's ministry and execution by Herod Antipas.
So some of what is in the scriptures is actually corroborated and historians tend to agree they occurred. But most historians view Abraham as a mythical figure, who's stories were passed down over generations. How interesting that he (real or not) ended up being the foundation of so much!
I am waffling away. Opportunity to talk theological history rarely comes up in daily life! A hill I am prepared to die on is that theology is fascinating, even if you're not religious. But you might argue that! It tells us all about how our societies were formed - law, morals, war, culture.
All of this - at least for some of us - were things cooked up in the middle east thousands of years ago!