Tiny pink puffs
Those small pink growths are called rose galls, also known as Bedeguar galls. (See “The Rose Bedeguar Gall, Diplolepis rosae” - https://easywildflowers.wordpress.com/2014/12/23/the-rose-bedeguar-gall-diplolepis-rosae/.) They are not dangerous.
These growths begin after small gall wasps lay their eggs in the leaves. But fear not, these wasps are only interested in the leaves and are so small that few people see them.
Sprays won’t stop their development. You may be able to decrease their presence if you cut off the affected leaves, then discard them in the trash.