For a butcher shop, first look at the halal scope recorded for the business: the offer may be listed as fully halal, partial, or unknown when there is not enough information. Certification details, when present, are a separate signal from the overall scope and should not be used to assume that the whole offer is covered. Reviews and practical information can then help you compare different shops.
On Haliago, these signals remain separate: a certification on record does not by itself mean the entire offer is halal, and missing information is never turned into a guarantee. Listings may also show reviews, opening hours, open or closed status and other practical details when available. Before visiting, open the listing you are interested in and check the information that is actually provided. These details can change as listings are updated: they describe the information currently recorded on Haliago, not a certification issued by Haliago.