Yes, the white waxy residue left behind on the stem is from a type of planthopper nymph. Although they suck sap, they do not cause serious or visible damage to the plant and can be ignored. They can be found on a wide variety of plant species this time of year. The close-up insect image might be a planthopper nymph or a "debris-carrying" lacewing larva, it's hard to tell since it looks larger and rounder than a planthopper. (Some of these larvae use lichen to cover themselves, while others use white wax from insect prey or the dead prey bodies themselves.) Either way, since lacewing larvae are predacious and good to have in the garden, no intervention is needed.

Miri

You're welcome.