“BIL” in ‘Amazonese’ (or 'Amazonish" if you prefer) is an acronym for “Build International Listings” - it’s the fundamental aspect of Global Marketplace(s) synchronization.
The SHC (“Seller Help Content”) ‘parent’ page in the Global Selling ‘tree’ is currently titled the same - “Build International Listings” (link); the BIL Dashboard itself should be available to you @ https: //sellercentral.amazon.com/listing-preferences/build-international-listings.
n.b. that the URL provided in the aforementioned help page for accessing this Dashboard, https: //sellercentral.amazon.com/gp/global-selling/sync-offers, will typically redirect there; I’ve been trying, sporadically, for seven damn years to get the Editorial Team to update the URL to no avail.