Spittle bug? Purple leaf sand cherry, mahonia, peonies

My 3 10+ year old prunus cistena shrubs are being attacked by something (photo attached). I think it’s spittle bug. Also, my peony leaves are being eaten by something (photo attached). My mahonia has brown leaves. Photo of spittle bug…

Foam patches on my roses and yarrow

I have these ‘foam’ bubbles/clumps on my roses and yarrow. Are they harmful or should I remove them. The majority of my plants are native 90% and organic.…