For the wifi smartlife stuff, you can use the official cloud based integration or if you want local control, the unofficial tuyalocal. The official integration is really easy to use but if your internet connection drops, you can't control your devices so I prefer to use tuyalocal it still requires to add the devices to the smartlife app once and then you add a device from the addon by scanning a qr code with the app. Once this is done you have local control over the device.

Zigbee devices require more initial setup, you have to buy a dongle, install the Zigbee2mqtt addon and the mqtt integration, but once this is done adding a devices is a really simple process : you put the devices into pair mode and allow pairing for 90s in the Zigbee2mqtt page and rename your device to something useful.