Lack of Large number of Taxa

[JLammons14]

I had a quick question,

Currently I am analyzing samples from the vaginal microbiome with ANCOMBC 2. The vaginal microbiome typically isnt very diverse, and in our samples we identified 23 unique species/un-speciated genera which isn't uncommon for our studies. Would only including these 23 taxa invalidate the results since that is too low for consistent bias correction?

Also, thanks for a great package.