iCloud photos not appearing

About a day ago I accidentaly reset my Iphone to factory settings through a recovery software when I was trying to retrieve deleted photos. Ended up wiping my phone after I clicked restore not knowing it would 'restore' it to it's facorty settings. And to make things worse I had not backed up in over a year due to my storage being full. So I ended up having to use a backup from about a year ago and go from there. However, to my suprise, a couple of photos as recent as this week started popping up along with some of my other data. Apparently this is due to iCloud syncing which I had not know about. Despite this, some of my photos and videos are still missing on both my phone and iCloud with a select few photos reappearing. Is there a way I can get these back?