To clearify, ZHA/zigpy developers have actually used a Zigbee sniffer to sniff the Zigbee traffic to and from those Tuya Zigbee USB Range Extender and seen that they not only do not comply with Zigbee specifications but thay are as well actually dropping messages from some non-Tuya devices, and it is therefore that the ZHA/zigpy developers are strongly recommending not to use that Tuya USB Router with the default factory shipped from factory.
So if using it with any non-Tuya devices then should consider flashing it with different firmware, and to flash it with different firmware are going to need a JTAG adapter compatible with Silicon Labs EFR32.
Specifically, it uses Silabs EFR32MG13 / EFR32MG13P732HI chip, same as Tuya TYZS1 module, which should have 512KByte Flash program memory (and 64KB RAM data memory,), see:
https://usermanual.wiki/Hangzhou-Tuya-Information-Technology/TYZS1L-4315271.pdf