Medicare periodically updates its 15- to 20-page PDF of data around COVID. Much of it is normalized to cases per 100K based on race, Dual-Beneficiary status, and geography. A new file has been released based on data through April 24, as received by May 21:
The death rate among all hospitalized Medicare COVID patients was 17%.
On a separate note, I stumbled across some data where I live, Los Angeles County, that current COVID cases (including Delta) are enormously concentrated in a few cities out on the northern, high-desert, rim of LA County. Notes here. As has been true throughout the pandemic, cases are very sparse in upscale areas of LA County like Santa Monica. (Palmdale, two weeks, 209 cases; Santa Monica, two weeks, 16.)