How do I get all the photos on my phone onto my icloud account and have every single one on there instead of just some?

I opened icloud.com and only about 1/4 of my photos were on there. I have 2,357 photos on in total.

It might be that you ran out of storage space! I empty out a lot of iCloud photos often, and park them on my hard drive, burn them to a CD, to send them over to another storage place - like Google Photos (which I hated for years - but they are so much better at organizing vacations, etc., now!) So see if you can remove some photos from there and store them elsewhere - and after you have done a lot of housecleaning, wait a day and see if your need ones get uploaded. Free is nice - but no unlimited.

I would check out YouTube for your answers.