Yep, to request the addition of a taxon, head to the parent taxon page and click Curation, then Flag for Curation on the right side of the page. Leave a short note in the reason section and use the comments section to explain further or add supporting references. Don’t use an existing flag to request a different thing.
If you have flagged a bird, there is no need to @ tag loarie (Scott Loarie) because it will already be on his radar.
For discussion of the slow bird curation due in part to the complex and server intensive 2019 Clements updates, see https://forum.inaturalist.org/t/plans-for-2019-clements-bird-taxonomy-updates/5397