Is there a place for face shield or the shields that we have seen in restaurants which fit on the chin and come up as a shield?

Face shields are not a replacement for a face mask.  

Source: https://www.canada.ca/en/public-health/services/diseases/2019-novel-coronavirus-infection/prevention-risks/about-non-medical-masks-face-coverings.html#a8 

Face shields when masks are not an option 

  • When communicating using lip-reading, when visual facial cues are essential, or when people may be unable to wear a mask due to a medical condition, a face shield may be an alternative to no mask.  
  • Some face shields may provide better protection than others. When needed, use face shields that wrap around your face and extend below the chin as well as hooded face shields. 
  • Non-medical clear masks that cover the nose and mouth are another option when visual communication is necessary. These options have not been widely assessed for their effectiveness.  

Source: http://www.bccdc.ca/health-info/diseases-conditions/covid-19/prevention-risks/masks