You can back up 'stuff' on android to google, but without third party software, there is no way to back up your phone as a unit. IN other words, all my car data is backed up, my contacts are backed up, etc...but if I erase my phone right now, It's up to me to recall what apps I had and go get them all. There used to be some back up software for this, but you had to buy it and it was third party and it only mostly kinda worked.
iPhone...back up....reset phone...restore. Done in less than 10 minutes. Fast. Easy. Native.
Continuity is completey different. That is where I can have my phone, ipad and macbook all linked. So, when I am at my desk working on my macbook, and I realize i left my phone in the living room (or at home), I can still make and recieve calls and texts on all apple devices I have. I can even type out a text on my mac and continue it on my phone. Or I can start on my phone, realize its going to be a long text, and pick it up on my mac where i have a keyboard. Its continuously synced and linked. It's so useful I cannot believe Google and Android havn't simply copied the technology...lawsuits be damned.
I like a lot about my android phone....but there are a few features on Apple devices that I can give up everything on my Android for. It's a huge advantage to write the software for one type of device you create like APple does. However, Pixel and Android are similar, but it doesnt seem to have any of this.