Payment method changed as part of Internal change but didn't go for approval

Summary: While doing internal Supplier profile change request, when we are changing only the default payment method for an address, its not going for approval and is being directly saved.

Content (please ensure you mask any confidential information): While doing internal Supplier profile change request, when we are changing only the default payment method for an address, its not going for approval and is being directly saved. Is this attribute not enabled for approval? do we have a list of Supplier attributes defined which go for approval when changed?

How do we know which attribute is eligible for approval when changed?