Will openWRT work on my device (W6x) if there is only Acer predator connect w6d hardware to download? Or do i have to wait for W6x release?
Unless/until you can verify that the hardware is identical, it is not recommended to try flashing an image made for a different model. Firmware images are bespoke for each model for reasons ranging from the minor but important (pinout mappings) to major (chipsets), and everything in between.
Do you currently have anything that can authoritatively suggest that the hardware is identical (and no, do not trust AI for this analysis)?