Zigbee - I use a Sonoff ZBBRIDGE Zigbee Bridge. Here’s a great thread to review.
433 MHz - I use the RTL433-to-MQTT add-on to translate 433 MHz RF messages into MQTT messages for sensors. Again, here’s a thread.
You have to be careful with the “auto-discovery” part. You’ll wind up with too many sensors that aren’t really yours, if you’re not VERY careful using it.