This is the most popular port. A developer known as "Hakkin89" on the XDA-Forums (unaffiliated) created a nearly-stable build for the MediaTek MT6739 chipset inside the XS11.
Let's be realistic: The Soyes XS11 is not a Pixel or a OnePlus. The custom ROM scene is small but dedicated. As of 2024-2025, these are the most stable builds available. soyes xs11 custom rom
Searching for "Soyes XS11 custom ROM" will likely lead you to: This is the most popular port