An experimental project I released as a Tier 2 reward on my Patreon: https://www.patreon.com/GhislainGir
Unfortunately this is kinda bugged both in 4.27.2 (in standalone only) and 5.0 for now afaik. Custom primitive data for foliage instances is broken! Works great in 4.27.2 in viewport though :D
Quick demo.