How many final-time home-team goals were there in total in all the matches of the Bundesliga division in the 2021 season?
Bundesliga is the name of division; final-time home-team goals refers to FTHG;
SELECT SUM(T1.FTHG) FROM matchs AS T1 INNER JOIN divisions AS T2 ON T1.Div = T2.division WHERE T2.name = 'Bundesliga' AND T1.season = 2021