Good Christians at many times and in many cultures have customs which are not specifically commanded in the Bible, but are nevertheless harmonious with Biblical faith and morals. Your mistake, TSgt, is in assuming that if something is not explicitly mandated in Scripture, it is forbidden.
But we are at liberty to do many things which are compatible with our profession of faith, and yet not mandated in Scripture, including:
•Putting the dead body, embalmed and casketed, in a Funeral Home, even with viewing of the deceased, amidst floral arrangements, before burial or cremation.
•Newspaper obits, and even online obits.
•Holding burial services at all (find me that in the Bible)
•Putting up tombstones
•Putting images of crosses, or angels, or flowers, or any other element of sculptural art on those tombstones
•Cremation of the remains, and conserving the ashes in an urn
•Putting wreaths at a monument to the dead (e.g. the Tomb of the Unknown Soldier)
•Ceremonies involving the National Flag for fallen members of the Armed Forces
And why confine this discussion only to non-Biblically-mandated funeral customs? We do things year-in and year-out not mandated in Scriptures:
•calling a person by a title like "Reverend" or "Doctor" or "Pastor"
•making statues and paintings of people we admire
•Easter eggs; and the very word “Easter”
•Christmas trees and holly wreaths
•parades and pageants and processions
•cakes for birthdays (and candles on cakes)
•brides with wedding rings,
•wearing white, carrying bouquets and
•Wedding ceremonies themselves, which were not commanded, commended, not even mentioned in Scripture.
We are at liberty to do all these things, because everything in life doesn't have to be authorized by a "verse".
I approve treating the bodies of the dead with reverence.
I await the resurrection of the dead, and the life of the world to come.