Police don't have time to observe every dodgy shop in the high street in every town.
There are far more issues which have them all spinning the plates to answer 999 calls to morons who need to learn how to keep their hands to themselves (seriously, if more men could keep their hands to themselves the levels of assaults, theft, rape, burglary, criminal damage etc would plummet).
They need people like you to report your concerns.
Not just to police (you can use the 101 online service for any police force), you can also report to your local council trading standards if you suspect fake or counterfeit goods being sold or if its a vape shop you think is serving underage kids....
You can also use Crimestoppers for anything you prefer to be anonymous - suspected modern slavery for example, or suspected fronting businesses which could be drugs, human trafficking, child exploitation, county lines, you name it.
If no one reports, everyone who says they knew but did nothing is complicit IMO.