On census.gov, the major tables are all stuck on 2010 still https://data.census.gov/cedsci/table?q=ethnicity&tid=DECENNIALCD1162010.P3

The site is nearly incomprehensible, but I see no ethnicity maps at all, even though there are other maps which require just as much detailed data. The third-party demographics map sites all lag way behind once the data comes out, even though the effort should all be automated.

This claims to alert to when the data is available: https://public.govdelivery.com/accounts/USCENSUS/signup/22746