The Injīl is a book revealed by Allāh (Glory be to Him), like the Qur'ān, and the Tawrāt (Torah) - it is His Speech, not the word of a man.
While it is possible that in some form, certain statements from the Injīl have survived in the "New Testament", as a whole, the Injīl is lost.
The Gospels of the Christian "New Testament" are accounts of the life of 'Īsā ibn Maryam (Jesus, the son of Mary) (peace be upon him), which (purportedly) record some of his travels, statements, and acts. They are books of history written by men. The remainder of the "New Testament" consists of the Acts of the Apostles (another historical work), epistles attributed to early Christian leaders (especially Paul), and the Book of Revelation, attributed to John. By the standards of historical criticism identified and employed by our scholars traditionally (and I believe any person of fair mind must admit these principles are sound), these works are all of dubious authenticity.
Jesus (peace be upon him) was given the gospel, and we are told he was preaching it. Just like the prophet Muhammad (ﷺ

was given the Qur'an. There are some differences, for example in the case of Jesus (peace be upon him) it was only the last reminder to the Jews, which you can consider more like a final update for the covenant of the Jews, in modern terms. Meanwhile the Quran is a new revelation, one that is meant for the entire world until the last day.
If you pay attention however, you will notice that the gospel that was given to Jesus is not actually in the Bible. People speak of Jesus in the new testament, it is a collection of rumours and 2nd or 3rd hand accounts collected and compiled into biographies by people who never met him, plus some other stuff like letters from Paul. Nowhere in the Bible will you actually find the verbatim words of Jesus, that he claims were given to him by God, which is preserved and can be differentiated from regular human speech like with the Qur'an.
In fact, so many forgeries, additions, and errors have been discovered in Bibles that millions of believers used to read that they keep having to release new updates as older and presumably more reliable manuscripts are found. Does that sound like the word of God given to a prophet? Of course not. We don't actually have access to the Injeel anymore, even if some of it made it into the bible, we have no way of knowing which parts those would be.
شبان من خلفية علمية يسألون مسلم! عباس وزوار ركن المتحدثين الخطباء
https://www.youtube.com/watch?v=zFwlUeHqsXc
رحلتي من السحر إلى الإسلام - فتاة بريطانية تركت السحر وأسلمت
https://www.youtube.com/watch?v=cdU2n6UyPx4
نساء بريطانيات يرتع_شن من هذا المسلم بعد هشّمهم هاشم Speakers Corner
https://www.youtube.com/watch?v=YpTuI6buJOY