I put on ST X coilovers. If you're thinking about going that route, keep in mind the rear sits really low even adjusted to max height. I had to use spring spacers to get it to a reasonable height (no rubbing).
There's a really good thread about lowering options for the Alltrack on vwvortex forum.
Front Struts from a 2019 Alltrack with 4k miles - $100 + shipping or local pickup in SF Bay Area
No springs. Whatever is in the picture is what's included.
BFI Solid Bushing Lower Control Arms - SOLD
https://blackforestindustries.com/products/mk7-mqb-control-arms-rs3-solid-rubber-bushings-with-ball-joints
Purchased from a forum member and never got around to installing. Claimed to have only been used for a month.
Photo of ball joints shows...
IS20 Rev G
I purchased this from a forum member, but never got around to installing it. Claimed to have 38k miles.
$380 +shipping or local pickup in SF Bay Area.
I have a set I just took off with about 4k miles on them. Not including strut mounts, strut bearings, rear shock mounts, and rear dust covers. Let me know if you're interested.