Hi,
if you currently want to disable blocking for some time, you still only can disable it for every device.
At least for me, this was never the case since using Pi-hole and imo makes not really sense.
Mostly you are working at one device, something does not load and you test if it is Pi-hole by simply deactivating it for a brief moment.
Not cool then every time to disable it for all devices, and doing it via group management is practicable.
Regards
Hyper