I can tell you what I did when I cancelled DISH after 25 years at the beginning of 2022. I had my hopper and joeys still hooked up and my external hard drive still plugged in and my ota antenna and my usb tuner still plugged in.
My satellite channels disappeared of course in the guide except free stuff and my ota channels kept on working and my guide information for them still worked. I was able to use them and timers still worked and my dvr ability still worked for them. Even the Auto skip feature worked on my ota channels the next day for ABC /NBC and CBS after 7 days and Fox like 3 days later - just like when I was still using sat locals. My external hard drive also worked and I was able to watch anything on the drive. My joeys also still worked in the bedroom and office.