I created an easy to use list builder for 40K 10th edition - Lemmy.world

https://furka.github.io/40k-10th-list-builder/ [https://furka.github.io/40k-10th-list-builder/] It supports all factions (including forge world) and lets you adjust which models are in your personal collection. (source code: https://github.com/furka/40k-10th-list-builder [https://github.com/furka/40k-10th-list-builder])