In 1.16 it was possible to summon a large rabbit with the command /summon rabbit ~~~ (any character string) and then a large rabbit would be summoned.  Currently the rabbits summoned with the command are all regular sized. My son really liked to keep the large bunny in his home for unusual creatures and is sad that the big bunny is no more.  Could the big bunny be brought back as a nametag Easter egg?