Hey there ralitsa288,
Thanks for reaching out to the Apple Support Communities.
For help with troubleshooting issues with your photos not syncing with iCloud, check out this link here: If your iCloud Photos aren't syncing to your device - Apple Support
What your status message means
If your iCloud Photos aren't syncing, do not turn iCloud Photos off. Syncing with iCloud might be paused for a variety of reasons, including if you turn on certain device settings or need more iCloud storage.
If you see Saving Cellular Data or Low Cellular Data Mode
iCloud Photos automatically pauses syncing until you're connected to Wi-Fi for a variety of reasons. If this happens, you might see a status message and the option to Sync Now. To sync your photos to iCloud, tap Sync Now. Or, turn off Low Data Mode.
If you see Saving Battery Power or Low Power Mode
iCloud Photos temporarily pauses syncing if your device is on Low Power Mode or if it's low on power. To sync your photos to iCloud, you can charge your device's battery, turn off Low Power Mode, or tap Sync Now next to the status message.
If you see Waiting to Sync
If you see a status message that says Waiting to Sync, make sure that your device is connected to the internet and wait a few minutes for the sync to complete.
If your iCloud storage is full or almost full
If you exceed your iCloud storage limit, photos and videos won't sync to iCloud and your library won’t stay up to date across your devices. To continue using iCloud Photos, you can upgrade your storage plan or reduce the amount of storage that you're using.
Also, be sure to enable Optimize iPhone Storage in Settings > Photos so the full resolution version of photos are stored in iCloud, while the smaller space saving version is stored on your iPhone. Check out this link for more details: Manage your photo and video storage - Apple Support
Keep us updated on the results after going through the steps above, and we'll continue from there.
Take care.