Do Bench Press on the Floor

No never. To me it has limited use. If a powerlifter wants to work on the lock out portion of the lift. But you'd be using barbell. I've never seen dumbbell floor press.
You should give it a go for a few times see how you like it. You may be surprised how well it works your chest.

Im not into powerlifting so maybe that’s why I don’t have issue with using it as my main chest exercise
 
The problem with bench press is mostly the bar...it forces a relatively wide arm posture... Best case is a neutral grip so a machine is the only option.

A machine is the only option?

Multi-grip Swiss bar over in the corner waving its hands saying “pick me, pick me!”
 
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