I'll start with a basic question. What are you trying to accomplish? Looking at the link you provided, you are dealing with a device that Armbian does not support (and I doubt anyone around Armbian has any knowledge of this particular device). You mention in your first post linux 6.0. So I therefore assume you are looking to add support to linux 6.0 and Armbian for this device??? If that is the case, I would first ask do you have the skills and experience to undertake such a task? Adding support for a new device into the mainstream kernel is a very difficult task, that often takes years of effort to get most of the features working (for someone experienced doing such tasks).
As for this particular respeaker 2.0 sbc, what are your plans for using it? It would appear to be a specialized device for audio applications. Which would lead me to believe that there are specific components on this sbc that will need proper driver support in the mainline kernel as well. Which would likely make the task even more difficult to get these specialized features working on mainline.
As a general rule I would say that usually for a new device the process is to first become familiar with the manufacturer provided legacy linux code base (i.e. be able to build the legacy code from source and start building an understanding of what specialized components the sbc has that may need to be supported in mainline). Then generally the next step would be to bring that legacy code base into the Armbian build framework to get it working there. Then start working on getting basic functionality working on mainline (by basic I mean things like getting the board to boot (building a mainline uboot and kernel that can boot the device)). Once you get the device to boot on mainline, then you start working on getting each feature working, hdmi, networking, usb, etc. Then finally getting any device specific features ported/working.
In looking at the respeaker 2.0 legacy source code download, it looks like the legacy code is linux 4.4 base. There will be a significant effort necessary to bring a seven year old code base up to mainline. All this is easier if you have the help of the manufacturer, but that rarely is the case.