The device is new, the problems are old

Ideas & Suggestion
1

The device is new, the problems are old.
By using a presence sensor, I thought I would get rid of the older problems that existed when using door opening sensors and motion sensors.
So… It is very important for me to determine the presence of a person in the room as accurately as possible, so I made the minimum acceptable value for determining presence - 1 minute. Next I control the light. I made a script: if there is no movement (and this is, as I wrote, 1 minute), then the delay is 3 minutes and the lights are turned off, even if a person is detected during these 3 minutes. This problem can be partially solved by increasing the detection time, but then the error in visual control of the presence of a person is too large. As discussed earlier, you need to come up with a way to reset the response timer upon re-detection - reopening the doors, if it is a door sensor, and so that this script must work locally - without the Internet.

2

For local only scene, you can use products like iHost for automations.

But for presence triggers, I would recommend more adjust the position of the sensor, as it does not require long delay for light automation. You can also alter the tolerance/freeze time of the sensor itself, which is more efficient.

3

for local scenes for zb devices I have zb bridge pro. The position of the presence sensor has nothing to do with it. Once again I will try to explain what the problem is. The scenario is this - IF “no movement is detected”, THEN “delay 3 minutes”, “turn off the lights”. It is necessary to make sure that if a person is detected during these 3 minutes, the timer is reset and the light does not turn off until the person’s absence is detected again. THE “TIMER RESET” FUNCTION IS NEEDED when presence is detected again

4

That’s more like a moderation to the current trigger?

From

WHEN zone is clear THEN delay 3 minutes - turn off lights

To

WHEN zone is clear for 3 minutes THEN turn off light

5

If it has to be LAN only, you will have a problem with it. Currently, this cannot be done without the Internet.

Theoretically, it could be possible to do this locally, but it is a complete step beyond the ewelink ecosystem of scenes.

The Sonoff device itself probably won’t be able to handle it. You need to have some central point, such as a server, that will run the logic flow…
I doubt whether devs will implement such functionality.