Do I need to be there?
No. Give the keys to your property manager or maintenance lead, or set up a lockbox.
The estimate lands in your inbox with a link to approve it. The booking text names the day, time and address, so you can forward it to whoever holds the keys.
Work waits for your approval. Hidden damage found later comes to you as a written change with its own price. When the job is finished, you get a text asking you to review the work.
Walkthroughs run seven days a week from 7:00 AM to 7:00 PM, so pick a slot that suits whoever has the keys. Want to see the result before you release the unit? Ask for a final walk against the scope with you or your manager.