I had a semi official twitter response about removing all presets from the E1 series camera

"Reolink @ReolinkTech 23 Jun
Hi there, the preset function was available for the E1 series previously and we have removed it from these cameras for an upgrade. We don't plan to release this function soon. If there are any updates, we will let you know."

THe latest 7/10/2020 firmware further destroys functionality for me
I was using a perfectly acceptable manual exposure of 255 - they have now locked this to 125
although the this value was above 125 sugested in the app it was perfectly usable (amazed how good the night looked)
this now means im stuck with pirch black camera iamge (i cant use ir led)

A anyways seems they dotn like their own E1 Series much or their customers