I wrote a step-by-step account of setting up a ROC-RK3328-CC as a roon bridge here:
https://community.roonlabs.com/t/setting-up-a-roc-rk3328-cc-as-a-roon-bridge/234596
This device is available for $40 or $50 on Amazon depending on the RAM and works beautifully as a Bridge. The instructions are somewhat Mac-centric and I understand this is not in your wheelhouse… however, the price is right and it’s really not too difficult.