I am using LE 9.X dtbs for LE of course! Those two dtbs are from LE and they work on my device (+wifi +eth).
There can be a difference in the dtb between two successive subversions. "LE 9.x" is not much information in itself, because there have been many community builds of 9.0, but I don't know of anyone else who has made 9.2 for AML. Moveover, I use the kernel modified by kszaq instead of the official legacy LE's amlogic kernel.
That's why I asked you that if you use v9.2.8.18, please use the dtb included with it. I wanted you to see this clearly, it's no coincidence that the dtb was also updated during the update process.
I was only reporting to you that the box indeed has eth and wifi hardware that works when tested with another OS, because you talked about the device not reporting wifi hardware being present.
I didn't say that I don't see a wifi adapter at all, I just said that I don't see a Realtek SDIO wifi chip because the mt7601u is a chip manufactured by MediaTek, and it also connects via USB instead of SDIO, so the RealtekWifi dtb makes no sense.
However, since I now have two dtbs to pick, do you want me to provide some logs of both to see if one works better than the other, or some other kind of test?
Meanwhile, I compared the p201 and gxbb_p200_1G_100M device tree sources, and their Ethernet parameters are exactly the same, so there can be no significant difference between them. Therefore, I don't understand why your Ethernet didn't work with the gxbb_p200_1G_100M_RealtekWiFi.dtb, unless it's because it comes from a different build (e.g. a different LE build or CE).