. I took some photos on my phone. My phone is on wifi. I took some pictures. They aren't showing up in Photos. Is there a way to force Photos on my Mac to sync?
Browse and download Photo & Video apps on your iPad, iPhone, or iPod touch from the App Store. The App Store has a wide selection of Photo & Video apps for your iOS device. If you have an iPhone with base storage, you’re most likely used to backing up your photos on Apple’s iCloud. But what if you want to share or download your backed-up iPhone photos? Well, you can download them directly from iCloud to your Mac! If all your photos are on your iPhone, you can simply share them with your Mac via AirDrop.
Did you close the camera.app on the iPhone? The iPhone will only upload new photos after the camera.app has been closed. Check on your Mac at www.icloud.com in the Photos.app, if the photos already uploaded to iCloud. This way you will know, if the bottleneck is the iPhone or your Mac.
Are you using iCloud Photo Library for syncing or My Photo Stream?
If your Mac is using iCloud Photo Library, it will download new photos from iCloud once it finished uploading all photos and videos, that still need uploading to iCloud
To check the status of the upload, see this Help page: Check the status of your library in Photos for macOS - Apple Support
How To Download Apple Photos To Mac Catalina
What does the status line on your Mac show?