If you mute a profile, I believe it also blocks the DM.
I too use nostr:nprofile1qyx8wumn8ghj7cnjvghxjmcpz4mhxue69uhk2er9dchxummnw3ezumrpdejqzrthwden5te0dehhxtnvdakqz8nhwden5te0dehhxarj94c82c3wwajkcmr0wfjx2u3wdejhgtcpr4mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmp0qyf8wumn8ghj7mmxve3ksctfdch8qatzqythwumn8ghj7un9d3shjtnrw4e8yetwwshxv7tfqyt8wumn8ghj7un9d3shjtnwdaehgu3wvfskueqpzemhxue69uhhyetvv9ujuurjd9kkzmpwdejhgqgcwaehxw309aex2mrp0yh8xmn0wf6zuum0vd5kzmqqypfjmqcdllsfcyl8t693ghyz2uv0cy4sqqlkr4s7jpmhy8rll7fuk34pfty also get these SPAM DM's. Is there a way to block Nostr DM's?