There is no need to deliberately follow the ceremony when the relatives of unfamiliar colleagues die. He doesn't usually say anything unless he is told specifically.

Everyone will be surrounded by many strangers, colleagues, classmates, neighbors, acquaintances of friends, or people who have done something together but no longer associate. It's so tiring and worrying that so many strangers go to the ceremony.

These people won't feel it if you follow the ceremony, and they won't feel it if you don't.

Just deal with the world of people with good relationships.