When you share your booking page on Facebook, Messenger, or other social apps, the link preview now shows your own image instead of a stock tote photo. Your About Us and Contact Us pages work the same way. If a page doesn't have its own share image, it now uses the OG / Social Image you uploaded in Settings, just like your homepage already did.
If you haven't set one yet, upload an image to OG / Social Image in Settings and it'll show up on all of these pages. Facebook and Messenger hold onto old previews for a while, so if you still see the old photo, paste your link into Facebook's Sharing Debugger and click Scrape Again to refresh it.