Hello tatum158,
Sorry to hear about the display crack on your Apple Watch. These repairs take a bit longer since they are not completed in the service center you visit. They have to be sent off to the Apple Repair Depot to be serviced. You can find information about the timeframe for the repair here:
Apple Watch Service & Repair - Apple Support
Here's the path you'll use to get information on how long the repair will take.
- Get Service > Repairs & Physical Damage > Cracked or broken Display > Continue
For example, in the US it's stated that repairs will take between 5-9 days.
Hope this helps.
Best regards.