Their are multiple scrappers in PB so you may have selected the incorrect one, if you want I can share my lead list that I scrapped from LinkedIn (non sales nav or premium) that will give you idea of data you can get using PB
You can scrape 2500 leads from LinkedIn sales nav a day.
I prefer using phantombuster for scraping as it gets the additional info like about section as well and has variety of LinkedIn scrappers.
To verify or find emails I would suggest liftkit or anymailfinder. (if you want emails)
You wan the leads for email outreach or linkedIn outreach?
(asking cus I think I can guide you further on this as I have been doing outreach myself)
Have you tried phantom buster to scrape from linkedin sales nav? I use that along woth anyemail finder to scrape and enrich the leads with emails and than I Use an automation that uses GPT and leads about section and other data to personalize very single cold email send via instantly.