Wireless standard for garden (switches, sensors, etc.)

hey, i’m looking for a radio standard in the garden. I have installed KNX in my home (also in the garden). However, I no longer want to lay the KNX cable everywhere where I need a motion detector, water sensor or light switch, for example.

I would like to use a wireless standard that has many battery-operated sensors on offer and is still flexible (e.g. flush-mounted sensor to then connect ‘nice’ light switches to it in binary)

Do you know anything here or would you recommend something?

If you want to stay within the KNX eco system then I was told that there are also wireless KNX sensors.