This hardware is supported by OpenWrt. If you are looking to replace the stock firmware with OpenWrt, follow these steps.
You have a newer hardware stepping (PB773 vs PB772). Solution: Search for Tpd.rt2840.pb773 instead. Do not force-flash cross-revisions. Tpd.rt2841.pb772 Firmware
Requires an RT809H or UFI Programmer to write data directly to the eMMC chip via ISP (In-System Programming) or by removing the chip. 🛠️ Common Faults & Software Fixes This hardware is supported by OpenWrt