It’s very likely that some of the properties you'll show will be occupied. The current tenant has been notified and is aware that a tour will be taking place. Prior to the tour, let the prospect know that it is an occupied unit just in case the property is messy.
Unfortunately, not all current tenants will make their place clean/tidy for showings. Please assure prospects that all property management companies require a professional clean between tenancies. Hence the property will be professionally cleaned before anyone new moves in.
If the property doesn't show well, beyond a reasonable state of an occupied property, please add details in the tour report, so the PM will know about it and will decide accordingly about future showings.