If new waste pipe is leaking. It has not been fitted properly.
It doesnt matter if its solvent weld, push fit or compression. There is no reason it should need any kind if selant smeared anywhere, especially where it’s visible. If this is the case, the job is flawed and any resonble tradesman would be prepared to remove his faulty work and complete it properly using only the materials intended for a new installation.
Plumbers, eh? Of all the trades they seem to be under the most stress to get jobs done in time. They don’t cost in travelling, buying bits and setup then clean down time so they are always under stress and prone to bodging.
Incidentally. As a generalization and me being a plumber. I resent this remark.