On CellMapper??Wonder if the 5G coverage maps will show which parts are n28 and which areas are n78?
If so then, CellMapper does enable filtering between various bands but not all data is registering under the filters, for instance turning on the filter to show n78 over the UK drastically reduces the covering markers...
It's also worth noting Vodafone is using n1 in a lot of places now too and that isn't currently showing on the map or as a filter.
Band 28 has shown up in the 4G filter list however but I can't find anywhere where the coverage has been mapped.
If you mean the operators coverage maps, its unlikely they will share such information.