"Heaven or the heavens, is a common religious cosmological or transcendent supernatural place where beings such as deities, angels, souls, saints, or venerated ancestors are said to originate, be enthroned, or reside. According to the beliefs of some religions, heavenly beings can descend to Earth or incarnate and earthly beings can ascend to Heaven in the afterlife or, in exceptional cases, enter Heaven alive."
https://en.wikipedia.org/wiki/Heaven
"Twice in three verses Jesus calls heaven a place. He means that heaven ("my Father's house") is a real place, as real as New York, London or Chicago. The place called heaven is just as real as the place you call home. It's a real place filled with real people, which is why the Bible sometimes compares heaven to a mansion with many rooms (John 14:1-3) and sometimes to an enormous city teeming with people (Revelation 21)."
https://www.biblestudytools.com/bible-study/topical-studies/what-is-heaven-like-11636670.html
"Heaven is most certainly a real place. The Bible very definitely speaks of heaven’s existence—and access to heaven through faith in Jesus Christ—but there are no verses that give us a geographical location"
https://www.gotquestions.org/where-is-Heaven.html
"Butts says he's certain of heaven's existence, but says it's in an indescribable dimension. "Heaven is in another dimension. So you don't necessarily have to look up but you can look out and see heaven. Heaven is a fourth dimension if you will," he tells Walters."
https://abcnews.go.com/International/Beliefs/story?id=1374010
"The belief that heaven or an afterlife awaits us is a "fairy story" for people afraid of death, Stephen Hawking has said."
https://www.theguardian.com/science/2011/may/15/stephen-hawking-interview-there-is-no-heaven