You’ll be able to provide feedback on a business’ safety measures via its page on Yelp, either through survey questions or by tapping the “Edit” icon in the top-right of a page’s COVID-19 updates section. The listing will display either a green check mark or an orange question mark next to the listed safety measures, depending on what a majority of users report. The icons shown will be based on an overall consensus from visitors, and only count responses over the last 28 days.
This is an excellent idea if used honestly.... a pity though that Yelp is not available in all countries, but I hope other restaurant review apps take this up as well.
You can give feedback on whether masks are being worn by staff.