Warden does not receive vibration from the snowball when touching the ground instead he receives vibration from the player throwing the snowball you (mojang) in java he receives vibration from the snowball but in bedrock not yet please correct this in beta / preview this week.

Extra:The java warden when he gets angry around our vision he has a dark area it is not darkness but one more area just please add this in bedrock thanks if so because it is one of the warden features