They are looking good Louis ! Have you fertilized them ??? We use the balls made for water plants....pushed down into the pot....they do so much better fertilized.
The first leaves on the lotus are "floaters"....then the tall spiky ones follow...hopefully by the blooms.
Does your water evaporate ? "water levels going down"
Is your pond lined or natural bottom ? We periodically have to 'top' ours off due to evaporation.
Are there fish in your pond ? Does it get full sun ?
I know a lot of questions...but nosey,.... I mean inquiring minds want to know.