This mod's amazing, and I see you've recently ported from quilt to fabric on 1.20.2+
As a modpack dev, it would be great if you could consider adding fabric support to 1.20.1 in the future as it is the main supported version by most mods/modpacks at the moment and would expand the availability of the mod to players and modpacks on 1.20.1.

Thanks for your time!

Fabric support will not be added for 1.20.1. Please use quilt. Your other fabric mods should run on quilt; if they do not, this can almost certainly be fixed either on the quilt end or on those mods' end

To add more information for anyone looking at this after the fact:

Excavated Variants relies on several APIs that fabric either does not have or implements badly. In 1.20.2+, as QSL/QFAPI was not ported yet, I decided to switch back to fabric in spite of this; I managed to basically re-implement many of these requirements myself. In 1.20.1, I cannot easily do so in some cases without making breaking changes - which I will not be doing within a single MC version. Thus, I can't and won't really be porting it to Fabric in 1.20.1 - especially as anyone wishing to use it alongside fabric mods can simply run it on quilt.

Thanks for the info! Makes perfect sense and I appreciate you taking the time to provide a detailed response