I'm not sure if that's true at a regional level.
In general it seems that death risk is related to age, employment, location (Hastings , for example is almost covid-19 free), and health.
Ethnicity is likely not to be a risk factor in itself.
However non-white British people are much younger than white people, so if for example nearly all the jobs involving lots of contact with others are done by non-white British in areas where they are numerous, then that will give those not white British people a higher risk relative to white British people on that area.
However it's largely zero sum in that the same jobs need doing elsewhere, so it's simultaneously possible for ethnic minorities to be more likely to die than white people of the same age, because of their employment, and for the young age of those ethnic minorities to substantially cut the raw death rate.
Because as observed above, the BBC claimes Newham had the highest death rate in the UK, when in fact it was 75th, and it only appears high when you adjust for the lower risk due to age.
Essentially ethnic minorities are LESS likely to die, for certain, as a population, but that's because they are much younger than white British people.