I always thought you needed some "new growth" to continue to grow once the clone roots.
IMO I feel like trying to clone from a single fan leaf would be a waste of time, even if it roots I dont see where the growth would come from
Ive been taking cuts and have a 100% success rate
I just take the cut from the main stem
at a 45 degree angle dip in rooting gel
And mist the dome 3 times a day
Usually have roots in 8-10 days (no fancy cloners just a dome and spray bottle)
These should be rooting in the next 2 - 4 days
If anybody clones from just a fan leaf I'm interested to see it
But imo I think the regular way of taking clones would be more efficient.