Cannot pair HomeKit bridge with iPhone

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Hi, I have a raspberry pi 3b running HassOS connected by Ethernet cable.

My iPhone is connected via wifi, either through a Tenda nova mesh wifi system or directly to my BT home hub.

I have installed the HomeKit bridge integration. It generates a QR code to add into home app on iPhone. But never pairs. Have tried a lot of different lines in the configuration file. Demo mode, including entities, excluding all. Etc. It will not pair, I have tried different iPhone connected to different wifi networks. Other HomeKit devices have shown up automatically but I want to expose my zigbee devices and tuya devices to home kit.