Preface: I've never heard of that device AND I personally wouldn't trust unofficial builds.
That said, since I was looking for that device on the official LOS supported devices list, and since I couldn't find it, I clicked on the link in that guide "Lineage OS 17 ROM..." and that brought me to SourceForge where, in a big green button, it says "download latest: Lineage OS 20..." which is Android 13. Wouldn't that solve everything? The only remaining issue is that gAPPS aren't updated (link brings to a page where the latest gAPPS you can download are for Android 11.0)