Flash memory is actually 16MB. I made the edit on wikidev.
You can tell because dmesg | grep spi-nor returns [ 0.867989] spi-nor spi0.0: gd25q128 (16384 Kbytes)
Additionally, vrpatil's PR also has the same flash size https://github.com/openwrt/openwrt/pull/3786#:~:text=SPI%20Flash%3A%20W25Q128%20(16MB)
So no need to worry about the impending 8/64 requirements 