IPhone stuck on Apple logo

My iPhone XR had too much storage and when I tried to update it to IOS 14 it wasn't loading, like the page to update wasn't loading and i refreshed settings and the same thing happened it just gave me a sign saying to try again later and so i tried to force restart my phone because that usually helps and so when i turned it back on it was stuck on the apple logo and it didn't turn on it would just be there for several minutes and then turn off again and it would repeat. Now, I have a iPhone 7 which works perfectly fine and i backed that one up through Itunes with a apple charger because i didnt want to risk it with that one either, i backed it up when i had 5gb available in icloud, and after i backed it up i saw 4 photos that werent there before i backed up my iphone 7 and I know this because i checked it my icloud before i backed it up to see what i had and those werrent there and they were taken by my iphone xr which was stuck on the apple logo. Is it possible that they just didn't appear before i backed up my iphone 7 unless i refreshed it OR did they upload after i backed it up. Those 4 photos were from August 6, 2020 an my iphone xr got stuck on september 17, 2020. since my icloud only had 5gb im assuming the rest was filled up by the photos on my iphone 7 so there wouldn't be enough space to back up more. so my question is, is it possible to backup an iphone while its stuck on the apple logo through backing up another iphone device through itunes or wifi, if someone has this same issue, please try to backup the iphone stuck on recovery mode or the apple logo through another iphone and see if icloud updates it or not. I had called apple support and they said it wouldn't have been possible because the iphone xr wasnt connected to the apple servers but i found it weird that those 4 photos had appeared after my iphone 7 backup, even though i didnt back it up through wifi but through itunes with the device itself with the USB/apple charger