I think all that might cause the OP more anxiety and nervousness.
Don't overthink it.
I suspect the OP is trying to land a medium sized jet as if it was a C172, but the jet needs to be FLOWN onto the runway.
The RadAlt readout is useful, but don't dwell on it too much when you really want to be looking outside, and doing things by feel and look.
I generally found the suggested "action" height of 30' (A320/321) to be slightly too conservative, and I would start at more like 20'. I arrest the descent rate - by looking outside - and then push slightly forward again, timing the thrust lever movement to occur just before the mains touch, (which comes with practice).
The OP might be arresting the descent and then waiting for the aircraft to sink onto the runway, like a C172, which is probably why you are floating. Jets need to be FLOWN onto the runway. Don't wait for a sink, fly it on, (but not at 700'/min, obviously !!).
= At about 20' arrest rate of descent - looking outside. Having done so, push slightly forward and coordinate thrust lever movement to idle.