Heb 11:1 Now faith is the assurance of things hoped for, the conviction of things not seen.
This is one reference of the word faith in the bible and clearly states that whatever is hoped for is not in existence at the present time. Whoever wants something to happen knows it is not now happening.
Is Jesus Christ coming back sometime in the future? There is no “evidence” or “proof” that it will happen, only the word of some writers in the bible.
One has to line up, roll up their sleeve, and be vaccinated, to believe Jesus is coming back (did he really ascend into heaven in the first place.)