Most product specifications (not limited to bikes) will always say 'subject to change' or similar. In my experience, this helps in the case that a supplier has a delay on parts, but you still need to ship out your product. In the bike industry, this happens all the time with tires for example. Also there are well known cases from Shimano and SRAM having delays, so different specs get chucked on bikes. 90% of people either won't notice, or don't mind the swap but are happy that they get their bike on time.
Most product specifications (not limited to bikes) will always say 'subject to change' or similar. In my experience, this helps in the case that a supplier has a delay on parts, but you still need to ship out your product. In the bike industry, this happens all the time with tires for example. Also there are well known cases from Shimano and SRAM having delays, so different specs get chucked on bikes. 90% of people either won't notice, or don't mind the swap but are happy that they get their bike on time.