There are no Jewish cemeteries in the Blundell Sands part of Liverpool. You can search for Jewish burial in Liverpool using the following search facility on JCR-UK at
This link will give you a summary of the history of the Liverpool Jewish community https://www.jewishgen.org/jcr-uk/Liverpool.htm
Similarly, the Jewish burials in Sheffield are now searchable on the United Synagogue's Find A Grave search facility as the the synagogue in Sheffield is now part of the United Synagogue. You search here - https://www.theus.org.uk/category/find-grave.
Otherwise, all you can does find the nearest cemeteries near to where you ancestors were living when they died. Just because they did not live near the main Jewish community doe snot mean they did not have a Jewish burial.
(former resident of Liverpool)