Most people have heard of Reishi mushroom nowadays and some are even using it for immune support

https://www.mdpi.com/2305-6320/4/1/15/htm?fbclid=IwAR2ehzYGX0vyr0cokJqlxF3vSzbQCXnHxD8FB5H35Y6c11X-ZhIA60f6GbU