This is just not true and sounds like some weird dog whistle:
https://ambulance.libguides.com/c.php?g=677734&p=4854430
From there is the following study which concludes “ Greater risk of severe COVID-19 in Black, Asian and Minority Ethnic populations is not explained by cardiometabolic, socioeconomic or behavioural factors, or by 25(OH)-vitamin D status” — so part of the reason this viewpoint isn’t getting more traction is simply that it doesn’t seem to be true
https://academic.oup.com/jpubhealth/article/42/3/451/5859581
In conclusion: “race realism” requires you to ignore the actual scientific data, as usual.